NFC in Xiaomi Watches: A Complete Guide to Features and Setup

You just bought a Xiaomi smartwatch with NFC support and you wonder what the acronym is? Or maybe you've been using the Mi Band or Xiaomi Watch for a long time, but you haven't figured out how to activate contactless payments or data sharing?

Xiaomi's NFC (Near Field Communication) technology is not just a fancy chip, it's a complete tool to simplify everyday tasks. From paying for purchases without a wallet to quickly syncing with other devices, the possibilities are wider than you think. But there's a nuance: not all models support the same functionality, and in some countries some options can be blocked. Let's see what exactly NFC can do in your watch and how to use it with maximum efficiency.

What is NFC in Xiaomi Watches and How Does It Work?

NFC (Near Field Communication) is a short-range wireless data transfer technology (typically up to 10 cm) that performs three key functions in the context of Xiaomi smartwatches:

• 💳 Contactless payments – emulation of a bank card for payment in stores, transport or cafes.
• 🔄 Fast synchronization – transferring data between a watch and a smartphone (e.g., device binding or contact exchange).
• 🔐 Identification is the use of a watch as a pass (in offices, fitness clubs, or smart home systems).

In the Xiaomi NFC-, the chip runs on 13,56 MHz and is compatible with ISO/IEC 14443 standards (types A and B). This means that the device can communicate with most payment terminals that support Mastercard PayPass or Visa payWave. Important: the payment function requires pre-configuration through the Mi Fitness or Zepp app (depending on the watch model).

Technically, the NFC in Xiaomi watches is implemented as Secure Element, a secure element that stores bank card data in encrypted form, which ensures that even if the watch falls into the wrong hands, card information cannot be extracted without authorization.

What Xiaomi Watches Support NFC

Not all Xiaomi smartwatches are equipped with a NFC- chip. Below is a table with current models (on the 2026 year), where this feature is available out of the box or after a firmware update:

Important: even if your model supports NFC, some features can be blocked at the firmware level for a specific region. For example, in Russia, the Xiaomi Watch S3 does not officially support bank card binding via Google Pay, but works with transport cards (like Troika in Moscow).

To check for NFC in your watch, go to Settings → Connections → NFC (the path may vary depending on the model). If there is no item, your device is not equipped with a chip.

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Before buying an NFC watch, check with Xiaomi or the seller whether the payment feature is supported in your region. Some models (such as the Mi Band 7 NFC) are sold in two versions: with and without a chip.

How to set up NFC on Xiaomi Watches for Contactless Payments

The process of setting up NFC- payments depends on the model of the watch and the region. Consider the universal algorithm for most devices (for example, Xiaomi Watch S3):

1. Install the app – download Mi Fitness (for Mi Band) or Zepp (for Xiaomi Watch) from the App Store or Google Play.
2. Tie the watch – go to the app, add a new device and follow the instructions on the screen.
3. Activate NFC – in the watch menu, go to Settings → Connections → NFC and turn on the function.
4. Add the card: 💳 In the app, select Payments or NFC. 📱 Follow the instructions for linking the credit card (card data entry and confirmation via SMS will be required). ✅ Once the card is successfully linked, the card will appear in the list available for payment.

To pay, bring the watch to the terminal at a distance of 2-5 cm and confirm the action (some models require you to press a button or enter PIN- code).

Add the card to the Mi Fitness/Zepp| Check the balance of the card | Make sure the watch is charged (minimum 20%)| Put the watch on your hand (heart rate sensor should touch the skin) | Check the compatibility of the terminal (contactless payment icon)

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In Russia and some CIS countries, Xiaomi is working with local banks to support payments, for example, in Mi Band 8 NFC, you can link Sberbank or Tinkoff cards, but only through the official application of the bank, not through Mi Pay.

Can you use NFC in Xiaomi watches for transportation?

Some models (e.g. Xiaomi Watch S3 or Mi Band 7 NFC) support emulation of transport cards, but the functionality depends on the region:

• 🚇 China – Full support for UnionPay cards for subways and buses in most cities.
• 🚌 Russia is limited support, for example, in Moscow you can tie Troika via the Metro app, but only on some models (check compatibility on the Moscow Metro website).
• 🇪🇺 Europe – In some countries (e.g. Spain or Italy), Xiaomi watches work with local transport systems via Google Pay.

To set up the transport card:

1. Open an application associated with your transport system (for example, Metro Moscow).
2. Select the option to add the device and follow the instructions.
3. Bring the watch to your phone to transfer data over NFC.

Warning: Not all terminals in transport support clock payment, and if the turnstile is on a green light but no passage, try using a phone or a physical card.

NFC security in Xiaomi watches: myths and reality

Many users fear that NFC- is less secure than a phone or a physical card, and that these fears are justified:

⚠️ Warning: If you lose a clock with a linked card, immediately lock it through the bank's mobile app. Despite encryption, there is theoretically a risk of unauthorized write-off when you bring the watch to the terminal (unless you need a PIN- code).

How data is protected:

• 🔒 Tokenization – instead of a card number, a one-time token is transferred, which is useless for fraudsters.
• 🛡️ Dynamic CVV – The security code is generated anew for each transaction.
• 📱 Two-factor authentication – Adding a card requires a confirmation via SMS or a fingerprint (on the phone).

However, there are vulnerabilities:

• 🕵️‍♂️ Relay attacks are theoretically possible, but require sophisticated equipment and proximity to the victim (in practice, extremely rare).
• 🔋 Battery discharged – if the clock turns off during payment, the transaction can go through twice (check the statement).

For maximum safety:

• Set the PIN- code on the watch (even if the model does not require it for payments).
• Turn off NFC when you are not using (in the clock settings).
• Use a separate card with a limit to link to the clock.

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Xiaomi’s NFC watch is safer than a physical card without a chip, but inferior to the protection of payments via a smartphone with biometrics (for example, Face ID).

What to do if the NFC on Xiaomi watches does not work

If the NFC refuses to work, check the following points:

1. Model Compatibility – Make sure your watch does support NFC (see table above).
2. Update firmware – go to Settings → System → Software Update and install the latest version.
3. Regional restrictions – some features (e.g. Mi Pay) only work in China, and other countries may need to change their region in the settings of the watch.
4. Antenna damage - if the watch fell or came into contact with water, the NFC- chip could have failed, in which case only the service center would help.

If the problem is linking the card:

• 📱 Reinstall the Mi Fitness or Zepp app.
• 🔄 Try to link another card (the bank may be blocking transactions).
• 📧 Contact Xiaomi support via the official website, specifying the watch model and the error.

Typical errors and decisions:

If nothing helps, try resetting the clock to factory settings (Settings → System → Reset), but note that this will delete all data, including tied cards.

Alternative ways to use NFC in Xiaomi watches

Payments are not the only use of NFC, but here are some other useful scenarios:

• 🔑 Smart home – Some watches (e.g., Xiaomi Watch S1 Pro) can act as a key for Mi Home devices (e.g., opening a door lock).
• 📱 Fast couple with a phone – hold your watch to your Xiaomi smartphone to quickly transfer contacts or photos.
• 🏋️ Fitness clubs – in some halls, the clock can be used as a pass (support from the club is required).
• 🎫 Tickets and coupons – Some services (e.g. AliExpress) allow you to save discount coupons in the NFC- Chip Watch.

To configure alternative functions:

1. Open the Mi Fitness or Zepp app.
2. Go to NFC → Additional features.
3. Choose the script you want and follow the instructions.

Example: To use a watch as a key for a Mi Smart Door Lock, you must:

1. Install the lock and the Mi Home app.
2. Add a lock to the app and link it to your Xiaomi account.
3. In the lock settings, select the option to add the NFC- key and bring the watch.

Note: To work with a smart home, the watch and lock must be tied to a single Xiaomi account.

FAQ: Frequent questions about NFC in Xiaomi watches