What is NFC and why you need it in a smartphone
NFC (Near Field Communication) technology has long ceased to be exotic – today it is built into most modern smartphones, including the Xiaomi Redmi Note 10S. This chip allows you to exchange data at a distance of up to 10 cm without an Internet connection, which opens up a lot of possibilities: from contactless payments to automation of a smart home.
In Redmi Note 10S, the NFC module supports ISO/IEC 14443 (types A/B) and ISO/IEC 18092, which guarantees compatibility with most bank cards, transport tags and IoT devices. However, many users are not even aware of the hidden potential of this feature – for example, it can unlock the office door, quickly connect to Wi-Fi via tags or transmit contacts with a single touch.
In this article, we will analyze not only the basic functions (payment by phone, reading labels), but also advanced use cases. NFC on the Redmi Note 10S — From setting up automation to solving typical connectivity problems, and at the end, you'll have a unique compatibility table. NFC-tags with this model of the smartphone, which is not in the official documentation of Xiaomi.
How to enable NFC on Xiaomi Redmi Note 10S: step-by-step instructions
Before you use NFC, you need to activate it in the settings. In the Redmi Note 10S, this is done in a few steps - the main thing is not to miss the key points.
Open the Settings menu → Connection and Sharing → NFC. Here you will see three main switches:
- 🔄 NFC — main activation toggle
- 💳 Contactless payments (defaulted off)
- 📱 Android Beam – for data transfer between devices (obsolete in new versions) MIUI)
After NFC is enabled, an N icon will appear in the top notification bar, which means that the module is ready to go. Please note that contactless payments will require additional configuration in the bank application (more on this in the next section).
Enable NFC in Settings | Make sure the N icon appears in the notification bar | Check compatibility with the banking application (if you need payments) | Update MIUI to the latest version (solves connection problems)
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⚠️ Note: Some of the Redmi Note firmware 10S (particularly custom NFC It may not be on the menu, because the manufacturer is turning off support for certain regions, and the solution is to have a global version. MIUI via Fastboot.
Configure contactless payments via NFC
One of the most popular uses of NFC is to pay by phone instead of a bank card, and on the Redmi Note 10S, it works through Google Pay, Samsung Pay (if installed), or banking apps (Sberbank Online, Tinkoff, etc.).
To set up:
- Install the bank application (for example, SberBank Online) and log in.
- Go to the contactless payments section or "NFC-payment".
- Add the card by following the instructions (you will need to enter card data and confirm via SMS).
- In the NFC settings (Settings → Connection → NFC), enable the contactless payments option.
Now, you just have to unlock your phone and bring it to the terminal, and it's important that not all terminals support payments through the terminal. NFC Smartphones – if payment doesn’t pass, try another terminal or check if the mode is on HCE (Host Card Emulation in Developer Settings.
Google Pay|SberPay|Tinkoff Pay|Another bank|Not using-->
| Banking appendix | NFC support for Redmi Note 10S | Is root required? | Features |
|---|---|---|---|
| Sberbank Online | ✅ Yes. | ❌ No. | It works without complaints, supports Mir and Visa/Mastercard. |
| Tinkoff | ✅ Yes. | ❌ No. | Requires the latest version of the app (update via Google Play) |
| Google Pay | ⚠️ Partially. | ❌ No. | There may be problems with Mir cards on some firmware |
| VTB Online | ✅ Yes. | ❌ No. | Visa/Mastercard only supports, Mir does not work |
Transfer of data and files via NFC
NFC on the Redmi Note 10S allows you to quickly share small files (contacts, links, photos) with other devices, using the Android Beam protocol (although new versions of Android have replaced it with Nearby Share, but NFC can still be used).
How to make contact:
- Open the contact in the "Contacts" app.
- Bring the back of the Redmi Note 10S to another smartphone (NFC must be enabled on both devices).
- Wait for the sound signal – the data will be transmitted automatically.
Limitations:
- 📱 Maximum file size: 1 MB (for larger files, use Wi-Fi Direct).
- 🔋 NFC consumes minimal energy, but when used actively can slightly reduce the time of autonomy.
- 🔒 Not all applications support transmission through NFC (For example, some messengers block this function).
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If NFC data transmission is not working, try turning off the power saving mode in the battery settings. Sometimes MIUI limits the module's background activity to save charge.
Work with NFC-Labels: Automation and Smart Home
Redmi Note 10S supports reading and writing NFC-tags (e.g. stickers) NTAG213/215/216), So this opens up the possibility of automating routine tasks, for example, you can customize them:
- 🏠 Quick Wi-Fi connection at home – just attach the phone to the tag on the door.
- 🎵 Running a playlist in Spotify when touching a tag in the car.
- 🔦 Turning on a flashlight or "Do Not Disturb" mode on the desktop.
To work with tags, you'll need an application like NFC Tools or Trigger.
- Buy the empty ones. NFC-tags (cost from 50 rubles per piece).
- Open NFC Tools, select "Write" → "Add Record".
- Specify an action (e.g., “Open URL” or “Enable Wi-Fi”).
- Hold the phone to the record label.
⚠️ Attention: Format tags NTAG213 They have a limit on the number of overwritings (about 100,000 cycles). NTAG216 more memory-wise.
How to drop NFC-factory-mark?
Solving NFC Issues on the Redmi Note 10S
If NFC doesn't work or doesn't work, the causes can range from software failures to hardware constraints.
| Problem. | Possible cause | Decision |
|---|---|---|
| NFC is not included in the settings | Regional firmware without NFC support | Install a global MIUI through Fastboot |
| Phone doesn't see a mark. | Weak signal of the NFC antenna | Bring the phone closer (optimally - 2-3 cm) |
| Payments are not working with Google Pay | No HCE certification is available | Use the banking application (SberBank, Tinkoff) |
| NFC shuts down on its own | Energy-saving MIUI mode | Add NFC to battery optimization exceptions |
If the problem is not solved, check the integrity of the NFC antenna - it is located under the back cover next to the camera. If you fall or hit the contacts may move, in this case, you will need to disassemble the device (you should contact the service center).
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Before resetting your phone settings, untether all bank cards from NFC in the bank apps! otherwise, you may need to re-assign with confirmation via SMS.
Hidden NFC features on Xiaomi Redmi Note 10S
In addition to standard features, the NFC in the Redmi Note 10S can be used for non-obvious tasks:
- 🔑 Emulation of key cards for intercoms (requires Mifare Classic Tool app and compatible tag).
- 🎮 Connecting gamepads (some wireless joysticks support pairing via NFC).
- 📦 Quick setup of new devices (for example, Xiaomi AirDots headphones can be connected with a single touch).
- 🚗 Diagnostics of the vehicle through OBD-II adapter NFC (For example, to read engine errors).
To emulate key cards will require:
- Download the Mifare Classic Tool from Google Play.
- Scan the original intercom card (if it is based on MIFARE Classic).
- Record the dump on the empty NTAG216 label.
- Put the phone to the intercom reader.
⚠️ Note: Emulation of other people's key cards may be illegal in some countries (in Russia - according to Art. 272 of the Criminal Code of the Russian Federation "Illegal access to computer information"). Use this function only for personal purposes (for example, duplication of your own key).