NFC Xiaomi Mi 9: A Complete Guide to Setup and Application

Xiaomi Mi 9 is the flagship of 2019, which is still relevant thanks to the powerful hardware and support of modern technologies. NFC. It not only allows you to pay for your purchases with your smartphone, but also automate routine tasks, share data with other devices, and even manage a smart home. NFC Because they don’t know how to properly set it up.

In this article, we will discuss all the ways of using NFC Xiaomi Mi 9 – from basic setup to advanced scenarios, you will learn how to link bank cards for contactless payment, transfer files to other devices, use a smartphone instead of a pass or door key, and solve typical problems with the module. We pay special attention to hidden functions. MIUI, which allow for greater opportunities NFC Automation and integration with Xiaomi services.

What is it? NFC Why you need it in the Xiaomi Mi 9

NFC (Near Field Communication is a short-range wireless communication technology (up to 10 cm) that operates at 13.56 MHz. Xiaomi Mi 9 uses a chip NXP PN80T, which supports all the basic standards: ISO 14443 (for maps and marks), ISO 18092 (for data exchange between devices) and FeliCa (Japanese standard, less commonly used in Russia).

Main advantages NFC Mi 9:

• 💳 Contactless payments – payment in shops, cafes and transport without physical cards.
• 📱 Data transfer – the rapid exchange of contacts, links or files with other smartphones (Android Beam).
• 🔑 Smart automation – running scripts on touching NFC-tags (for example, turning on Wi-Fi at home).
• 🚇 Card emulation – using a smartphone instead of a pass, pass or door key.

It is important to understand that NFC Mi 9 only works when the screen is unlocked (except for payments where fingerprint confirmation is required or PIN-It's a security limitation that you can't turn off, and it also uses a minimum amount of power, and it doesn't have much of a constant impact on the battery life.

How to turn on NFC on Xiaomi Mi 9: step-by-step instructions

By default. NFC Mi 9 is disabled to save battery life. To activate it, follow the following steps:

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. Move the slider. NFC inclination.
5. Optionally: Turn on Android Beam (needs to share data with other devices).

Once activated, an N icon will appear in the status bar, which means that the module is ready to go. If the icon is not there, try restarting the smartphone or checking if it is blocking work. NFC power-saving.

Make sure the module is enabled in the settings

Check for the absence of metal covers

Update MIUI to the latest version

Reboot your smartphone-->

⚠️ Note: Some of the firmware (especially custom) NFC If the module does not respond to tags after activation, check the version MIUI In Settings → The phone, the version recommended for stable operation MIUI 12.5 and higher.

Configure contactless payments via NFC

The most popular application NFC — Pay for purchases with a smartphone. for this Xiaomi Mi 9 can be used:

• 💰 Google Pay – a universal solution for cards Visa/Mastercard.
• 🏦 SaverPay or Tinkoff Pay – applications of Russian banks.
• 🚇 Three / Strelka - for payment of fares in public transport (requires a separate setting).

To set up payment via Google Pay:

1. Download the app from Google Play.
2. Open it and tap Add the map.
3. Scan a physical card or enter data manually.
4. Confirm the addition via SMS or banking application.
5. After successful binding, select the default card for payment.

For payment in the store:

1. Unlock the Mi 9 (print or print) PIN-code).
2. Hold the top of the smartphone (where the module is located) NFC) terminally.
3. Wait for the sound signal or vibration – the payment will be automatic.

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If the terminal is not reading the card, try holding the smartphone at a different angle or clearing the area around the module. NFC Sometimes it helps to turn off the cover (especially metal).

For transport (for example, Troika in Moscow):

1. Download the app My Pass (or analogue for your region).
2. Link the virtual card to your account.
3. In the settings NFC Select a Transport Card and activate it.
4. When passing through the turnstile, unlock the smartphone and bring it to the reader.

Transfer data and files via NFC (Android Beam)

With help. NFC You can quickly share small files, contacts, or links with other Android devices, a feature called Android Beam, which works on the principle of touch and pass. The limit is a maximum file size of 1 MB (for large files, you better use Wi-Fi Direct or Bluetooth).

How to transmit data:

1. Turn it on. NFC Android Beam on both devices (in Connection and Sharing settings) → NFC).
2. Open the file, contact, or web page you want to send.
3. Bring the Xiaomi Mi 9 back to another smartphone (distance 1-2 cm).
4. Wait for the beep - the screen will appear the inscription Touch to transmit.
5. Slip it on the screen for confirmation.

List of supported data types:

• 📎 Contacts (vCard)
• 🔗 Links to web pages
• 📁 Files (photos, text documents up to 1 MB)
• 📍 Geolocation (coordinates on the map)
• 🎵 Links to apps in Google Play

⚠️ Note: Android Beam only works between Android 4.0 devices+. If the transfer does not start, make sure that the second smartphone is also enabled. NFC Also check if the transmission is blocked by power saving mode or third-party applications (for example, antiviruses).

Use of the NFC-tagging

One of the most interesting opportunities NFC — Tagged with tags, a tag is a small chip (like a sticker or key fob) that, when touched by a smartphone, triggers a pre-tuned script. With the Xiaomi Mi 9, this works through the Mi Home app or third-party utilities like Trigger or Automate.

Examples of useful scenarios:

• 🏠 Home Mode – Touching the tag at the door turns on Wi-Fi, Bluetooth and triggers music.
• 🚗 Car mode – activates the navigator and connects the Bluetooth headset.
• 🛌 Night mode – turns off the sound, turns on the “Do not disturb” mode and starts the alarm clock.
• 💼 Operating mode – opens the necessary applications (mail, calendar) and disables notifications from social networks.

How to set up automation through Mi Home:

1. Buy it. NFC-tags (e.g. Xiaomi Mi Smart) NFC Tag or universal NTAG213).
2. Open the Mi Home app and go to Automation.
3. Tap it Add → NFC-marker.
4. Bring the tag to the smartphone for its registration in the system.
5. Select the actions to be performed when touching (e.g., Enable Wi-Fi). + Launch Spotify).
6. Save the script and place the tag in a convenient location (like on keys or next to the bed).

For advanced users, if standard Mi Home features aren't enough, use Trigger, which allows you to create chains of action with delays, conditions, and even integration with Tasker, for example, you can set the tag so that when you touch it, it:

1. Sent. SMS with your location to a relative.
2. It's got battery saving.
3. I started recording video from the main camera.

Emulation of cards: how to use Xiaomi Mi 9 instead of a pass or key

NFC mi 9 Supports emulation of standard maps ISO 14443 Type A/B And Mifare Classic, which means you can use the smartphone instead of the Mifare Classic:

• 🔐 Key cards for intercom or office.
• 🚪 Passes to the university or fitness club.
• 💳 Discount cards of shops (if they work on the basis of the NFC).

Emulation will require:

1. Annex NFC Tools or Mifare Classic Tool (available on Google Play).
2. The original map you want to copy.
3. NFC-a record label (if emulation on a smartphone is not possible).

Importantly, not all cards can be emulated directly from a smartphone, such as Mifare Ultralight or Mifare DESFire, which require a separate label, and some systems (such as bank cards or transport applications) use dynamic keys that cannot be copied.

Step-by-step instructions for copying a simple card (for example, an intercom):

1. Open up. NFC Tools and select Reading.
2. Bring the original map to the Mi 9 – the app counts its data.
3. Save the card dump to the file.
4. Put a clean one in. NFC-mark (e.g., marker, NTAG216) and select the record.
5. Download the saved dump and wait for the recording to be completed.

⚠️ Note: Copying some types of cards (e.g., bank or transport) may violate user agreement and even local law. Before emulating, check if it is allowed for your card. Also note that the Xiaomi Mi 9 does not support Mifare DESFire emulation. EV2 and LEGIC Advant – they will require specialized equipment.

Solving problems with NFC Xiaomi Mi 9

If NFC Your Mi 9 is not working or is not working properly, check the following points:

If NFC stopped working after the MIUI update, try:

1. Reset network settings: Settings → System → Settings Reset → Reset settings Wi-Fi, mobile network and Bluetooth.
2. Clear the app's cache NFC Service: Settings → Annexes → Application management → NFC Service → Warehouse → Clear the cache.
3. Perform reset to factory settings (pre-return the data).

To diagnose hardware problems, use the engineering menu:

1. Open the Phone app and type ##4636##.
2. Go to the phone information section.
3. Scroll down and find the block. NFC — If status is disabled or error, this may indicate a module malfunction.

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If NFC stopped working after falling or getting moisture, most likely damaged antenna circuit, in which case requires repair in the service center - self- soldering can lead to complete loss of function.

FAQ: Frequent questions about NFC Xiaomi Mi 9