Is it necessary to turn off the NFC in the smartphone. NFC technology in smartphones: what is it needed and how to use it? Principle of operation NFC.

Recall the famous joke: the engine of progress is too lazy. You are tired of hanging in front of an ATM deal of payment cards of various banks, fusing, what are the money on what of them? Maybe you decided to keep up with the times and do not overload the wallet and pockets in cash? And how do you like the abnormal purchase of transportation tickets, not attending yourself spending time in the queues? All these obvious amenities characterize the potential of the rapidly developing non-contact technology NEAR Field Communication.

Bluetooth and NFC.

NFC technology is not the first invention to allow wireless file sharing. The principle of operation of NEAR Field Communication Middle Communication technology is based on the interaction of magnetic fields of specialized devices. In this case, the interacting devices are located apart from each other at a distance of up to 10 cm. Its predecessor - Bluetooth technology - provides communication at a greater distance - up to 100 m. Its work is based on receiving radio waves in the ISM range (2.4-2.48 GHz ).

For Near Field Communication Maximum reaches 424 kbps per second, which is an order of magnitude less than the Bluetooth communication speed, which is 2.1 Mbps per second. Does the regression take place?

By comparing the two above-mentioned technologies, we note that a reduction in communication range provides a higher level of data transfer. An important advantage of a newer than Bluetooth, a communication method is an instant connection of interaction devices (about 0.1 s). In addition, he assumes a connection with passive (inconsistency) NFC devices.

Hello everyone, we will look at what NFC is. This technology has appeared in smartphones for a long time, but many users undeservedly deprive it with attention. Why is needed? What does she know how and where is NFC applied? All these questions will be the answer in this article. First we will understand what this strange abbreviation NFC means. It decryls as Near Field Communication, which is translated as a commemoration of the near field or near contactless communication.

The distance at which the NFS technology does not exceed 10 centimeters. And the maximum transfer rate is only 424 kbps. The central frequency of the NFC is equal to 13.56 MHz. Development of technology was carried out since 2004, and the first specification of the standard was approved in 2006. And at the same time, the first device with support for NFC - Nokia 6131 came out.

In a nutshell, the principle of NFC technology can be described as follows. Each device has an induction coil, which generates an electromagnetic field. On another device there is another such coil, in it, under the influence of the field of the first coil, electricity occurs, which is later converted to the signal. Devices in turn generate electromagnetic fields and exchange them. This mode of operation is called active. And there is a passive mode, this is when only one device generates an electromagnetic field. Thus work cards or RFID tags.

Now let's wonder why NFC is in a smartphone. The first and, perhaps, the most common application is the transfer of files. There is one common myth, many think that the transmission is conducted directly by NFC. But in fact, the data is sent either by Bluetooth, or by Wi-Fi Direct.

NFC acts as a reliable identifier for devices. For example, the Google data transfer technology of Android BIN uses bluetooth for data transmission, but that everything worked as it should, devices first need to see each other by NFC. Samsung has its own implementation of SBIN, it transmits data at times faster due to the fact that it works already on Wi-Fi.

The second use of NFC, which has become becoming increasingly popular - it is non-contact payments. At the moment, a number of banks and electronic wallets have learned to work with NFC in smartphones. As a result, now using NFS, you can pay for public transport, lunch in a cafe or shopping in the supermarket. This method of payment is good because it is completely at hand. If you can still forget the card, then we do not part with the phone even in a dream.

In order for all this magic to earn, we need three things.

Obviously smartphone with NFC chip
Special software for payment and storage (details of the payment system card).
The terminal in the store accepting contactless payment.

Probably, you suggests the question: "How long is the NFS payments?". Could any be able to spend a transaction remotely without your knowledge? Well, judge yourself. In order to make a payment, the phone must be reduced to a distance of about 5 centimeters to the terminal, while the smartphone must be unlocked. And the likelihood that these two conditions will at least be adjusted by a fraudster, strive for zero. But even if the stars do not comply with your favor, then a limit on the maximum payment amount will be on the protection of your wallet. In most payment systems and wallets, it is set to 10-15 bucks by default. The threshold can be removed if desired.

In addition to payments, NFC allows you to quickly establish a pairing with peripheral devices. You can take a second second to the Bluetooth smartphone headphones, column or even TV. For example, Sony has television models to which the NFC phone can be connected. If desired, a list of unusual things that can be connected by NFC can be continued for a very long time, and I will give only a few examples. The first comes to mind the door lock with the NFC chip that can be opened from the smartphone, which is very convenient. You can also use the NFC ring for this.

You just program the necessary algorithm of actions and tie it to the label. They sat in the car, put the phone to the label and your smartphone did everything you need. Such scenarios can come up with a whole bunch of both work for work. Fortunately, these tags are very not expensive on Aliexpress. Most likely, this article describes not all methods of use of NFC and if you somehow unusually use this technology, share your ideas in the comments.

The NFC module was originally intended for payments to one touch. The SIM card with a built-in chip can be used both in stores, municipal transport and as a contactless "laundering" or business card. This technology also began to be applied in tablets and smartphones.

Leading manufacturers equip middle-class gadgets and higher adapters that allow you to instantly transmit data and perform other operations. Despite this, many users do not know what the NFC function is in the phone and how to enjoy this device.

The devices that function on the basis of the Android began to be equipped with special chips from the output of Operations 4.0 Ice Cream Sandwich. The NFS module is designed to communicate tablets, telephones at short distances from each other.

NFC technology in smartphones provides the user with the following features:

Quickly share various files;
Use a gadget as a pass to various organizations, institutions;
Carry out contactless payment in one touch;
Save or read data in a specific format.

Many advanced users are interested in what NFS is in the smartphone and is it really necessary for this function to the user, because all the gadgets are equipped with Bluetooth.

The NFS technology is most often used for payments, which means - the radius of the signal is minimal. The connection between the phone and the device is performed in seconds, providing full security, then you can not say about Bluetooth.

Does the device support the NFS interface

Not all modern gadgets have such a chip. On android can be installed a simple Bluetooth, which does not allow using the device to make secure operations.

How to find out if there is NFC in the smartphone to enjoy all its advantages. You can check for this feature through the settings located in the tablet or phone menu:

Go to Android settings;
In the line "Wireless networks" click "Advanced";
Log in in the NFS Settings menu.

Having found the necessary function, the user can activate it or set limitations. To do this, in the same tab you need:

Mark a tick opposite the "Allow data exchange" item;
Wait to turn on Android Beam;
If the function does not start automatically, click on Android Beam, then confirm the action performed.

On a note! NFS in the phone android - This is not a separate file transfer tool, other information, and the command device. Data exchange is made by wireless communications. The chip submits a command to activate the Internet and the transfer of information.

In which smartphones there are NFS

If the user knows what NFC is needed, it can easily use this module when performing various operations. Almost all modern gadgets are equipped with this technology. Here are some examples:

IPhone, starting with model 6s;
Samsung Galaxy with S3, LG latest models and Xperia X from Sony.

Other manufacturers can also please the presence of an advanced device. The NFC function on android allows various operations quickly, safely, which is its main advantage.

Possible use of the NFS module

The module can operate in several basic modes. Namely:

Active. Both smartphones are equipped with a special chip.
Passive. The model of only one gadget is used.

On a note! The chip operates in several modes. The first is used to exchange information between smartphones or planets. Purpose of the second - "Pass" or a map when passing in the subway, buying a bus ticket.

Contact payment of payments

In the emulation mode of the plastic card, the NFS chip makes it possible to pay for services, goods on terminals. The most common Android Pay services, for iPhones - Apple Pay. The module installed on the smartphone allows you to hide the data of the cardholder, thereby secure the operation.

How to pay via NFC from Android phone:

For payment you will need a map with PAYPASS support;
Download a special application;
Enter your personal page in the main menu;
Select the NFS item;
Attach plastic to the back panel, the smartphone so that the module considers the data you need.

With the help of the NFS option, the owner of the Gadget will be able to translate funds for the perfect purchase into one touch.

Fare of Public Transport

If you have certain settings, the NFS system can be used as an electronic ticket. Support for the latest technology will allow the passengers of underground and terrestrial transport much faster to use the chip when passing the turnstiles or fixation of the perfect trip.

Information sharing with modern technology

After activating the NFS, it can be used to exchange files. To send information, the user must adhere to a certain algorithm.

How to use NFC on a smartphone:

On gadgets to activate NFS and Android Beam;
Both mobile phones should work and be unlocked;
When smartphones are next to each other, the user will hear the corresponding signal that reports that the gadgets are in sight.

Attention! Separate devices can only be transmitted after the transfer of information is complete. The user learns about this on the appropriate signal.

Instant information scanning

Reading using an electronic chip is functioning by scanning a barcode - a label located on the carrier. They gradually come to replace paper codes and contain not only information about the manufacturer, but also composition, storage period, other data.

Reading individual tags

The principle of its work is similar to scanning barcodes. But in this situation it is not a camera on a mobile phone, but a sensor located under the lid. This feature is especially useful in home everyday.

To create labels, the user needs to install the application, which is possible through Play Market. A certain task of the smartphone owner will be able to fix it alone: \u200b\u200b"Create a message", "send a letter", "Make a call."

What if there is no NFS on the phone

Most smartphone owners are interested in how to use Android Pay without NFC. Mobile operators have developed SIM cards with a built-in signal transmission module.

What if the phone does not support NFC - the first option:

Buy a special SIM card;
Place it in the slot on the smartphone;
The chip is automatically activated.

On a note! It should be borne in mind that the signal dimensionsGSM. Different and depend on the format on a specific device.

What to do if there is no NFC on the phone - the second option:

Purchase an external device for contactless payments;
Next, you need to read the instructions, how to install NFC in the smartphone - most often it is simply necessary to fix it on the SIM card;
Place into the tray.

Attention! One minus is a method suitable for gadgets on which a removable cover is installed. Inspection models and mobile phones with side slots cannot be equipped with an external device.

Advantages and disadvantages of modern technology

The main plus of the NFS module is a slight energy consumption, available cost, safety and simplicity of use. But before activating this feature, it is necessary to study certain nuances.

Like all the devices, the NFC module has some drawbacks:

Little radius action. This delivers some inconvenience when using this technology. On the other hand, it provides maximum safety. The owner of the smartphone will not be able to accidentally pay for the goods, ask the command.

Unprofitable development of modifications for NFS. Manufacturers of "Haom" and "Sony" gadgets are trying to improve the process of transferring information. They independently produce details that work only with their smartphones or tablets. To enjoy all the advantages of the module, the consumer will have to buy mobile marks mobile phones, as well as install applications of only these developers.

On a note! Developers are gradually trying to eliminate some shortcomings and make different modifications to their technology.

If the user does not know how to connect NFC to a smartphone or finds it difficult to do this, it is better to contact a specialized center for help to experienced masters.

The NFS module allows you to make purchases into one touch and carry out other types of operations. If there is no present function on the smartphone, you can purchase a corresponding chip or SIM card. To ensure proper security, the owner of the phone will have to turn on the unlocking screen on the fingerprint or pin-code - there is no other output.

Using NFC Stickers

At the time of this writing, only devices on Android and Windows Phone support this technology, so Apple holders can think about buying another device. Winners of Windows Phone can read the article to understand the settings of the NFC stickers, and Android holders can follow the instructions, as they are written precisely under this operating system.

What does NFC technology offer us when using special stickers? For the beginning, see these very stickers that represent the subject of a thin layer.

They may look different, the main thing in them is that inside them have a special NFC chip. Perhaps this label is in your pocket, if there is a ticket there is a ticket for travel in the subway (by the way, I used such a ticket to work with this technology). So, it is worth putting your smartphone on such a NFC label and the phone to perform in advance the actions that the user can finely configure. Your capabilities are limited only by your desires: you can translate the phone to no sound mode in the meeting room; You can open the navigation map, enable GPS and mobile data as soon as you find yourself in the car; In the same machine, you can turn on Bluetooth to receive calls without being distracted by the phone; You can come to work and connect to the working Wi-Fi network and start flipping the calendar of meetings; at home disconnect from all networks and enable music; In a word you can set up absolutely anything. And for this, only at least one sticker is needed (you can buy them, it's not expensive) and a free application on Google Play, thanks to which the possibilities increase and the necessary actions can be performed not only when you bring the phone to the sticker, but also if the battery level reaches a certain mark ; Or you connect the headset; Or a certain point in time will come or even if you find yourself in a certain area. Believe me, there is a place where to turn around fantasy. In the meantime, we start setting the NFC.

How to use NFC or setting NFC tags

So, we need a phone on Android with NFC support. In addition, we need a NFC label (you can use a ticket from the subway). Now you need to download the TRIGGER application, install and run. The application is free, but the professional version with the maximum functionality is some money (the same not large). You can first enable the trial version. After all greetings in the My job menu, click on the plus, and the creation of the first task will begin, which will be executed when the phone is racing to the label. First of all, we will be asked to add triggers:

Wi-Fi. When this is selected, further actions will be performed when connected or disconnected from a specific network.
Bluetooth. A similar situation as with Wi-Fi.
NFC.. Actually nfc tags. The task is activated when a label is activated to the NFC (which we will mainly talk about)
Battery. Activation at a certain battery level. It is convenient to translate the phone to the economical mode with a small charge.
Time. Activation at a certain time.
Charging. Activation when connected or disconnected from the power supply.
Headset. Activation when connecting the headset (you can immediately turn on the song, just stuck headphones into the smartphone).
Calendar event. Complete name.
Agent. I think they will figure it out, I did not succeed.
Geo-fence. Activation when crossing some terrain.

By selecting the required trigger (and for the purposes of this article, I recommend choosing NFC, you must click further. In the next window, you can configure the restrictions on this task. So the task can be performed only at a certain time, at certain days, at a certain battery level and with various Wi-Fi technology status, Bluetooth and regime in an airplane. For my purposes there were no restrictions, therefore I just continued the setting, skipping this item. Next, you should get to the task menu (if not, click Next). That's where with the help Plusika You are free to add the necessary tasks to be executed with the conditions you have chosen (in our case, when you bring a label to the NFC). There are many actions, therefore I will list only actions of actions:

Wireless and Local Networks
Bluetooth
Sounds and volume
Screen
Social media
Messages
Applications and labels
Media
Agent
Travels
Signals
Events
Telephone
Samsung
Scheduler
Experimental

You choose the groups you are interested in, open it and choose the necessary action. For example, to enable music, you need to select media, and then put a tick next to the point to play multimedia. In the same way, all the tasks you need are configured, after which they click further. Some tasks will require additional configuration, such as Wi-Fi, you must enable or disable. After this additional setting, click add to the task. You can give your task a unique name or leave the default name, click Next.

The penultimate menu switches will be released. This is a fairly interesting point, for understanding which an example is necessary. Suppose we created a NFC mark, from the submission to which the phone begins to play music. Following logic you need another NFC sticker to create a new task on turning off the music. But you can use the Switches function so that two feedback performs the same sticker. To do this, in this menu, you must press the same plus sign and add a new task in the way the way there is opposite to the action. At the end of these works, click ready. After that, you need to put a smartphone on a sticker with which the phone is synchronized in less than a second. With a positive reaction, it remains to click the Finish button.

Possible problems when using Trigger

For this application, the same Google Play has several different plugins that are necessary for various actions. So the TRIGGER REUSE plugin allows you to reuse NFC stickers, such as tickets from the subway. All the necessary plug-ins can be found using the Trigger Plugin query on Google Play. Some of these plugins require additional settings, some - no. I think we'll figure it out.

Using NFC technology to pay for the subway

To use the phone to pay for travel in the subway, you must contact your cellular operator and clarify whether it supports this technology (MTS, VimpelCom, Rostelecom accurately support this technology). In the case of a positive answer, you must replace your SIM card on a special SIM card with NFC support and activate a special service (technical support or employees of the sales center to help you). After that (in theory), it is only necessary to replenish the phone's invoice in time so that one day the turnstile does not start screaming at you.

NFC technology I have already dedicated two articles. It's time to tell about special NFC labels or stickers that you can use in various places: at home, in the office or in the car, but often they are lying in the smartphone box or the table box. The NFC sticker will help automate the various functions of the smartphone depending on your location. Let's look at how it works.

As you already know from past materials, NFC is the type of wireless high-frequency connection of a small radius of action (from the English Near Field Communication - Communication of the Middle Field). The scope of the mobile device with NFC support can be expanded by special labels. It will look like this: you make a smartphone to a special NFC label, which is a small sticker with an integrated chip. In addition to the non-cash form of payment for various services, buying tickets and opening electronic locks of doors, you can use the ability to quickly start using the NFC labels of several functions of the smartphone, combined into a single profile. I will give an example: you come to the office and apply the mobile device to the label on the desktop, which, in turn, automatically starts connecting to a local Wi-Fi access point, goes into the "without sound" mode and begins to warn about the meetings planned in the calendar. NFC labels can be used in the machine: to enable Bluetooth, media player or application using GPS navigation. At home, one touch to the NFC label you can turn off the sound or disable mobile data transmission. To implement the above using such profiles there is no need for expensive additional equipment: only a smartphone or a tablet with a built-in NFC module, directly NFC sticker / label and a free application from Google Play. If there was no NFC label in the box with a mobile device, then NFC stickers can be purchased in online stores for 30-50 rubles per piece. Alternatively, NFC labels can use used tickets for traveling to the subway.

Next, I will tell you how to work with a smartphone using NFC technology. As an example, a smartphone on the basis of Android OS, as most mobile devices work based on this mobile operating system. Windows Phone users with NFC support will be able to configure the sticker using the NFC Interactor or NFC Toolkit application. Users of Apple devices remain aside.

How to set up nfc profile

With the NFC sticker, you can customize various profiles for easy operation with a mobile device, depending on your location.

Activation NFC. If an active NFC module icon is missing on the notification panel of your smartphone, then you can enable it using menu items. "Settings - Wireless Networks - Enable NFC» Or use a special widget. Then install the free Trigger application from the Play Market. Distinctive features of the TRIGGER utility is an intuitive interface and a large number of opportunities to automate the mobile device. After installing the Trigger, open the application and go to the menu item. "My tasks" .

Mode of operation. In the window that opens, click on the icon «+» . Go to the menu "Configure Task - + - NFC" To create tasks. I note that in the TRIGGER application, items highlighted in yellow will be available only after purchasing the PRO version of the utility worth ≈100 rubles. To further use the NFC functions in them there is no particular need. Zhmem. "Further" To go to the next menu item.

Creating a task. In the menu item "Set up task" click «+» And in the list of tasks, activate the necessary tasks. For profile "At work" Choose "Wireless and Local Networks - Wi-Fi On / Off" , "Wireless and Local Networks - On / Off Mobile Data" , as well as "Sounds and volume - sound profile" . To confirm, click "Further" and select in the menu "Enable" or "Turn off" These functions (menu items will be displayed on the left side of each row). Then you need to turn on Wi-Fi, turn off mobile data, and in the string "Sound profile" Select item "Vibration" And click the button "Add to task" . After that, give the name to this task - for example, "At work" - and press "Further" . In the menu item "Configure Switch" You can configure the task sequence that the TRIGGER application is alternately after connecting the smartphone to the NFC-label. To complete the work in the profile "At work", select the same functions again, only this time turn off the Wi-Fi, turn on the mobile data and deactivate the "sound profile", or set the settings at your discretion. Click "Add to task" And set the name, for example, "home". Now it remains to press the button. "Ready" .

Saving profile and setting the sticker. Save the profile on the NFC sticker by attaching your smartphone to it by the back side or just put your mobile device on it. To exchange data, the distance between the smartphone and the label should be several millimeters, so I recommend it in advance to think about the placement of NFC tags. After successful synchronization with the NFC label, the smartphone will depend on and message will appear. "Tag successfully installed" . After that click "Ready" - You will find yourself in the main menu of the application. Now the NFC sticker is ready to use and can turn on and off profiles alternately.

Record protection. After all the aforementioned actions, you can open the setup menu, which is in the top of the screen to activate the protection from another entry on the NFC-label, but in this case the information on the sticker cannot be overwritten. Problems with information on the NFC label may also occur and provided if the Trigger application must include a profile that has already been programmed in advance on the sticker. In this case, you will need tool Tag Reuse Plugin - a free application from Play Market, which does not need additional configuration.

Manage work time. If using the profile "At work" You want to control the time of your work, this will help the free Time Recording application from Play Market. No settings in it: Use buttons "Check now" ("Check IT Now") and "Turn off the check" ("Check Out Now") You can manually enter the data, and with "Change Task" ("SWITCH TASK") Switch from one task to another, for example, "My tasks - [Name of your task]" . In the menu item "Set up task" Choose "+ - applications and shortcuts - open the application" and confirm the settings by clicking "Further" . In the menu window that appears among applications, select "Time Accounting" (Time Recording - Timesheet) And in the next menu, select "SM.DynamicG.TimeRecording.PublicServices $ Checkln". Add the task and change "Install the switch" . Choose additionally in the menu item "com.dynamicg.timeRecording.PublicService Checkout". Write down the information on the NFC label to add to your profile "to work" the work time accounting program.

Installing and configuring PIN code

Thanks to the NFC label, you can install PIN on your smartphone using the Tasker application.

Installing Applications Tasker and Secure Settings. To control the on / off of the PIN query on the smartphone, you must additionally install the SECURE SETTING programs for it. The application has a bunch of useful features: from notification of full battery charge before turning off the sound when the device is reversed. Both utilities you can find on Play Market using the search, or download the application above the links above in the * .apk format on your smartphone and install it using the conductor. I recommend installing Tasker to the Trigger program to avoid conflicts, since TRIGGER will not have access to tasks Tasker. If you have already installed Trigger, select Backup Tasks (Backup) in the Installation menu, before you delete and install the application again. Then Restore TRIGGER data from previously backup.

Creating and configuring tasks. Run Tasker and go to the settings menu. In general parameters, check the box opposite "Allow external access" So that Trigger has access to the tasks of the Tasker program. Use the return button Return to the Main Menu, go to the tab "Tasks" ("Task") and press «+» To create a task. Create a name, for example "ON / OFF PIN" and check the box, select "Change Task" in the menu and press again «+» . In the window that appears "SELECT Action Category" Choose "Plugin - security parameters" ("Plugin-Secure Settings") .

Switching PIN code.In the program menu "Action Edit" ("Action Edit") which is on the right at the top, click on the pencil icon near the row "Configuration" to set the function SECURE SETTINGS. On the menu "All Actions" ("An Actions") Choose "Keyboard Lock" ("KeyGuard") and click on item "Switch" ("Toggle") . Save the settings by clicking on the diskette symbol, and you will come to the Tasker again. Click the Return button to return to the Main Menu of the application. It is important to get out of the installation menu correctly, otherwise the utility does not activate the task.
Integration of the NFC task in Trigger. Open the Trigger program. If you have already created a profile, log in with menu items "My tasks - [Profile Name]" Otherwise, simply create a new job by clicking on the button. «+» . On the menu "Set up tasks" Turn on the function , Press "+ - Tasker - Tasker Tasks - Next» . In the window that appears "Application Setup" Click on the magnifying glass icon, select "Tasks" and click "Add to tasks" . In the same order in the menu "Configure Switch" Add Tasker tasks again so that they are correctly installed in the Trigger program and it could perform them. Now you have only left to record information on the sticker, and you can turn on and off the PIN with the NFC label without any difficulty.

Problems with Galaxy Note 3. Google smartphones, NTS, LG and Sony switches to a PIN code without problems, but there are difficulties with the Galaxy Note device 3. In the case of this gadget, we recommend doing the following: Create not one, and two tasks Tasker. The first "On PIN", and the second - "Off PIN". Then in Secure Settings Plug-in Select "Password / Pin" ("Password / Pin") At the end of the list. For a task "Off PIN" Leave the function "Turn off" , and for the second task "On PIN" Activate the function "Enable" And create a password. Check the box in front of the string "Allow editing by the administrator" . The application will issue a request for advanced rights for Secure Settings - click "Activate" (It is worth noting that these settings do not affect the basic rights). If you want to remove Secure Settings, first of all it will be necessary to cancel the administrator rights in the program by selecting the menu items "Security - Administrator - Secure Settings" . Thus, you can make the necessary installations to activate and deactivate the PIN query for Samsung phones using NFC technology.

Contacts for NFC

Application for business cards. The NFC sticker is also capable of becoming a practical electronic visiting card. To save the contact details, you will need to install NFC by Moo app, which you can download for free from the Play Market. Prepare a sticker to transfer the contact data: to the application question "Clear Map" click "Yes - Delete all data" And bring the sticker to the back of the phone. Press "Cancel" You will return to the main application menu.
Saving contact data on the NFC label. Click "Save Contact" And manually select the information you would like to save, or send it by specifying the desired contact symbol. You can specify the name of the contact, position, place of work, e-mail, phone number, etc. The function of the forced recording of information can be included by putting a tick in front of the string "Lock data card" . Create data for business cards using menu items "Add information for a map - Write" .

Transmission of the electronic business card. To save information in a business card on other smartphones, bring the sticker to them. The device must include the NFC function, and the gadget itself is unlocked. Installing a special application will not need. To "perform an action using ..." your acquaintances need to choose "Contacts - only once" .