How to use it NFC Xiaomi Redmi 9T: from payments to smart labels

Xiaomi Redmi 9T supportive NFC — It's a budget smartphone that's as good as a flagship when it comes to contactless technology, but many owners don't even realize that their device can replace bank cards, open doors, or run smart home scenarios with a single touch. NFC on the Redmi 9T: From basic settings to hidden features that are not written in the official instructions.

It is important to understand that not all versions of Redmi are available. 9T fitted NFC-It depends on the region and the modification. M2010J19SG Most often supports technology, while some Asian variants (M2010J19SC) Before buying or setting up, check the specifications of your model through Settings. → The phone. → Model or on the official website of Xiaomi.

If you're Redmi. 9T fitted NFC, You can do it:

• 💳 Pay for purchases through Google Pay, Mi Pay or banking applications (SberBank, Tinkoff, etc.).
• 🔑 Emulate keys, passes, or transport cards (such as Troika or Arrow).
• 📱 Transfer files and contacts between devices with Android Beam support (an outdated but sometimes useful feature).
• 🏠 Automate tasks with the help of NFC-tags (for example, enable Wi-Fi when touching a tag on your desktop).

How to check if there is NFC On your Xiaomi Redmi 9T

Before you set up contactless features, make sure your smartphone supports them. There are three reliable ways to do this:

1. Check through settings: Open Settings → Connection and sharing → NFC. If there's no point, there's no chip in the device. If there's a point, but it's gray, you might need to update your firmware.
2. View specifications: Enter the phone model (M2010J19SG or similar) on the GSMArena or Xiaomi website, the Connectivity section should indicate NFC: Yes.
3. Visual inspection: On some versions of Redmi 9T on the back cover next to the camera marked NFC (The chip can also be marked on the device box.

⚠️ Note: If you have purchased a Redmi 9T in China or through unofficial channels, the chance of a lack of NFC In such cases, the module can be disabled at the firmware level, and activation will require flashing to the global version. MIUI.

If NFC This feature is not available, but you need to consider alternatives:

• 📱 Outside NFC-adapter (connected through the USB-C, But it requires root rights to work properly).
• 💳 Contactless bank cards (not all terminals support smartphones, but cards work everywhere).
• 🔄 Guarantee Exchange (if Support was specified in the specifications) NFC, But it's not there, it's a reason to come back).

Activation. NFC Xiaomi Redmi 9T: step-by-step

If there's a chip, you can turn it on in a few steps, and importantly, contactless payments will require additional setup to work.

Step 1. Inclusion NFC:

1. Open Settings (the gear icon on the main screen).
2. Go to Connect and Sharing (or Wireless Networks in older versions of MIUI).
3. Slip on NFC.
4. Activate the NFC slider (should turn blue).
5. Below, select the mode of operation: 📱 Reading only - for reading labels. 💳 Card emulation – for payments and keys. 🔄 P2P (Peer-to-Peer – to share data with other devices.

Step. 2. Setting up payments (Google) Pay/Mi Pay):

1. Install the Google Pay app (from Play Market) or Mi Pay app (if available in your area).
2. Open the app and add a bank card by following the instructions on the screen.
3. After adding the card, return to Settings → NFC and select the default payment system (select Google Pay or Mi Pay).
4. For safety, set up screen unlocking (PIN, print or pattern lock – without it, payments will not work.

To work with labels will need:

1. The label itself (you can buy on AliExpress or in electronics stores, cost from 50 rubles).
2. Application for programming, for example: NFC Tools (simple, suitable for basic tasks), Trigger (for script automation). Tasker (advanced automation, requires skills).

Instructions for setting the label:

1. Install the NFC Tools app from the Play Market.
2. Open the application and select Record.
3. Click Add Record and select an action (such as Wi-Fi or URL).
4. Fill in the settings (for example, Wi-Fi network name and password).
5. Put the tag on the back of the phone (where it is located). NFC-chip) and wait for the recording confirmation.
6. Check the work: Touching the tag should automatically connect you to Wi-Fi.

If you use banks that support Google Pay (and this is almost all major Russian banks), choose it. Mi Pay is worth a try if you need transport cards or you often visit countries where Google Pay is limited (for example, China).

Instructions for adding a card to Google Pay:

1. Open the Google Pay app.
2. Click Add Card → Credit or debit card.
3. Scan the map with the camera or enter the data manually.
4. Confirm the addition via SMS or push notification from the bank.
5. Once confirmed, the card is ready to use.

⚠️ Note: If you add a card error "This device is not supported", check it: 📱 The phone has a screen lock on (PIN/password). 🔄 The device is not rooted and has no custom firmware. 📋 The card is supported by the bank (the list can be specified on the bank's website).

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If Google Pay is not working on the terminal, try restarting your phone or temporarily shutting down. VPN — Some banks block payments if they suspect a change in location.

Emulation of access cards, passes and transport cards

One of the most useful functions NFC — The ability to replace physical cards (passes, keys, transport cards) with virtual copies of them. 9T It works, but with limitations.

What can be emulated:

• 🚇 Transport cards (Troika, Strelka, Plant) – through Mi Pay or specialized applications (Metro, Transport card).
• 🔑 Intercom keys - if the intercom supports MIFARE Classic or Ultralight (app required) MIFARE Classic Tool and root rights).
• 🏢 Office passes – only if the security system allows virtual cards to be used (many companies block this option).

How to copy a transport card (on the example of Troika):

1. Install the Metro app (for Moscow) or the Transport Card (for other regions).
2. Sign up through the state services or link a bank card.
3. In the My Cards section, select Add a virtual card.
4. Bring the physical card of the Troika to the back of the phone (where) NFC-chip) and wait for the copy.
5. You can pay by phone now.

Limitations:

• 🚫 Not all transport cards are supported (for example, the St. Petersburg shooter may not work through Mi Pay).
• 🚫 Copying intercom keys often requires root rights and may violate your utilities rules.
• 🚫 Some office passes use secure chips that cannot be copied without specialized equipment.

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Emulation of cards on Xiaomi Redmi 9T It is possible, but often requires additional applications or root rights. Before copying the passes, check if this is allowed by your organization's rules.

Solving NFC problems on Xiaomi Redmi 9T

If NFC It doesn't work or it doesn't work, and it can be a lot of things, from firmware bugs to hardware malfunctions, and we can look at the underlying problems and how to solve them.

1. NFC Not included (gray slider in settings):

• 📱 Check if your model supports Redmi. 9T NFC (see section above).
• 🔄 Update the firmware to the latest version MIUI (Settings → The phone. → Updating the system).
• 🔧 Reset network settings (Settings) → System system → Resetting settings → Resetting network settings).
• 🛠️ If nothing helps, it may be defective. NFC-chip (repair required).

2. Payments do not pass (payment error):

• 💳 Make sure the card is added to Google Pay or Mi Pay and activated.
• 🔒 Check if the screen is unlocked (on Redmi) 9T Payments only work when unlocked).
• 📶 Turn it off. VPN Proxies: Some banks block payments when they change location.
• 🔄 Restart your phone and try again.

3. The phone doesn't read. NFC-marker:

• 📍 Hold the phone to the tag at the back (where the chip is located, usually next to the camera).
• 🔋 Check the battery power - at low charge NFC may be off.
• 🛠️ Make sure the tag is not damaged (try another label).
• 📱 Enable Read Only mode in the settings NFC.

4. NFC It is unstable (it shuts down itself):

• 🔄 Turn off battery optimization for applications using NFC (Settings → Annexes → Permits → Optimizing the battery).
• 📱 Check if there are conflicts with other apps (for example, antiviruses or cache cleaners can block the application). NFC).
• 🔧 Reset the settings. NFC (Settings → Annexes → All applications → NFC → Warehouse → Clear the cache).

If the problem is not solved, try resetting your phone to factory settings (don’t forget to back up the data!).In extreme cases, contact the service center - perhaps the faulty itself. NFC-module.

Hidden functions NFC Xiaomi Redmi 9T

Besides the standard functions, NFC on the Redmi 9T You can use it for more interesting tasks. Here are some life hacks:

Fast file transfer between phones (Android Beam):

While Android Beam has officially been removed from new versions of Android, Redmi 9T It can be enabled through hidden settings:

1. Turn it on. NFC regime P2P.
2. Open the file (photo, contact or link) you want to transfer.
3. Bring the back of the phone to another device with NFC.
4. On the screen will appear a notification Touch for transmission - confirm the action.

⚠️ It does not work on all devices and may require additional settings.

Automation with Tasker:

With the Tasker application, you can create complex scenarios that run on the NFC-For example, a mark:

• 📵 Turn on flight mode and start the alarm when touching the label on the nightstand.
• 🎵 Run the Spotify playlist and turn on Bluetooth headphones in the car.
• 📧 Send. SMS or email with pre-prepared text.

3.Use of NFC game console:

Some games (such as Amiibo for Nintendo Switch) are used by the NFC-The Redmi figurines. 9T And the Amiibo Emulator app can emulate these figures:

1. Download Amiibo Emulator and the database of figures.
2. Select the desired figure in the application.
3. Bring your phone to the Nintendo Switch controller (or other console).

⚠️ Root may be required for the job.

4. Contactless control of the smart home:

If you have smart lamps, sockets or other devices (like Xiaomi Mi Home), you can customize it. NFC-tagging:

• 💡 Turn on/off the light when touching the door mark.
• 🌡️ Set the optimum air conditioning temperature when returning home.
• 🔒 Activate the security mode (turn on the cameras, close the curtains).

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Automating a smart home through NFC Easy to use the Home Assistant app with a plugin NFC Tag Automation.

FAQ: Frequent questions about NFC on Xiaomi Redmi 9T