NFC on Xiaomi 9C: A Complete Guide to Setup and Application

What NFC can do in Xiaomi 9C and why you need it

Module NFC (Near Field Communication in Xiaomi smartphone 9C — It's not just a technology checkmark, it's a full-fledged tool for fast transactions, automating tasks and sharing data. NFC It is often used for contactless payments via Google Pay or Mi Pay, in a budget-friendly way. 9C The chip has its own features, like, no support. HCE (Host Card Emulation for virtual cards, but it works well NFC-Tags and file transfers via Android Beam (in older versions of Android).

The main scenarios of using NFC on Xiaomi 9C:

• 💳 Emulation of transport cards (for example, Troika or Strelka in Moscow) – if your region supports this feature.
• 🔗 Quickly transfer contacts, links or photos to other devices NFC (For example, on the Xiaomi Redmi Note 10).
• 🏠 Smart home management: touching the NFC-Labels can be turned on lights, run scripts in Mi Home or Google Home.
• 🔐 Authorization in some offices or fitness clubs (where used) NFC-map).

It is important to understand: Xiaomi 9C Released in 2020, and its NFC-chip NXP PN547 It doesn't support all modern protocols, and for example, contactless payments through Google Pay won't work here because there's no certification for banking, but that doesn't mean that the module is useless, because it's possible in other scenarios.

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

Activation of NFC on Xiaomi 9C takes less than a minute, but there are nuances that are not written about in the standard manuals. First, make sure that your device has installed the firmware MIUI 12 or later – older versions of the menu NFC settings may not be available. Second, check if the module is disabled at the kernel level (this happens after informal firmware).

To turn on NFC:

1. Open Settings → Connection and Sharing.
2. Slip on the NFC item (if not, see the section “What to do if NFC is not on the menu”).
3. Transfer the NFC slider to the On position.
4. Optionally, activate Android Beam (if you need data transfer) or HCE (although it works on 9C only).

Make sure the battery is more than 20% charged

Update MIUI to the latest version

Check if energy saving regimes are in place

Disable metal covers (they block the signal)-->

After activating the module, the N icon will appear on the lock screen, which means that the chip is ready to work. If the icon is not available, try restarting your smartphone or resetting your network settings (Settings → System → Resetting → Reset your Wi-Fi, mobile network and Bluetooth settings).

⚠️ Attention: On Xiaomi 9C NFC It consumes energy even in the background, and if you don't use it all the time, it's best to turn it off after you use it, and that saves you up to 5 percent of your battery life per day.

How to use NFC for data transfer (Android Beam)

Android Beam allows you to share files, contacts or links between two smartphones with NFC. On Xiaomi 9C, it works, but with reservations: the transfer speed is limited (maximum 400 Kb / s), and large files (for example, video) are better sent via Mi Share or Bluetooth.

Instructions for data exchange:

• 📱 Turn it on. NFC on both devices (on both devices) 9C and on the second smartphone).
• 🔗 Open the file, contact, or web page you want to send.
• 🤝 Connect the back of the phones (NFC-chip 9C located at the top of the camera).
• 📲 Wait for the sound signal or vibration – this means that the connection is established.
• 📤 Click on the Xiaomi screen 9C, confirming the transmission.

Every day.

1-2 times a week

Rarely, only when necessary.

Never tried.-->

If the transmission does not begin:

• Check that the second device also includes Android Beam (in newer versions of Android, it may be called NFC-sharing).
• Make sure the screen is unlocked on both phones.
• Try to change the position of the devices – sometimes the NFC chips are not symmetrical.

⚠️ Attention: On Xiaomi 9C firmware MIUI 13+ Android Beam can be hidden. To get it back, install the app. NFC Tools from Google Play and use the built-in data exchange.

NFC-Tags: how to set up automation on Xiaomi 9C

One of the most useful uses of NFC is tags, which are small stickers or key fobs that, when you touch a smartphone, trigger pre-programmed actions, such as setting a tag at the front door so that when you come home, automatically:

• 🔦 Wi-Fi and Bluetooth turned on.
• 📱 Mi Home app launched to manage smart home.
• 🎵 He started playing his favorite radio on Yandex Music.

To work with labels will need:

• 🏷️ Same thing. NFC-tag (you can buy on AliExpress or in electronics stores, cost from 50 rubles).
• 📱 Programming annex: NFC Tools, Trigger or Automate.
• 🔧 Administrator rights (not necessary, but some actions require) ADB).

Example of setting up a tag to start Wi-Fi:

1. Open NFC Tools and select Write → Add Record → Wi-Fi.
2. Enter your network name and password.
3. Hold the tag to the back of the Xiaomi 9C (to the top of where the chip is located).
4. Wait for the recording to be confirmed.

💡

If the tag doesn't work the first time, try wrapping it with tape -- sometimes metal surfaces interfere with reading, and check if the power saving mode is on, which can block the background work of NFC.

Emulation of cards: transport, passes, discount cards

One of the most popular features of NFC is emulating plastic cards – transport, discount or pass. On Xiaomi 9C, this works partially: for example, you can write Troika or Arrow data, but only if it is not tied to the original media (some transport cards are blocked after the first entry).

Emulation of maps will require:

• 📲 Annex NFC Card Emulator or Mi Fare for Xiaomi).
• 💳 The original card you want to copy.
• 🔐 Root rights (not always, but for some types of cards required).

Step-by-step instructions for copying the transport card:

1. Install the Mi Fare app (available on the Xiaomi App Store or 4PDA).
2. Hold the original card to the back of the Xiaomi 9C (the NFC chip must read the data).
3. In the application, select Create a copy and save the file to the device.
4. Activate the emulation mode in the NFC settings.

⚠️ Note: Emulating certain types of cards (such as office passes) may violate an organization’s security policies.

Typical NFC Problems on Xiaomi 9C and Their Solutions

Even with the right NFC setup on Xiaomi 9C, users are faced with common errors, and here are the most common ways to fix them:

If the NFC stopped working after the firmware update, try the following steps:

• 🔄 Go back to the previous version. MIUI via Fastboot (instructions are available on the forum) 4PDA).
• 🔧 Install a custom core with support NFC (For example, the Pixel Experience).
• 📱 Check the integrity of the antenna. NFC — Sometimes it goes away after falls (diagnostics in the service center will cost you a lot). 300-500 ruble).

💡

Xiaomi. 9C NFC-If the phone falls down and the module stops working, it's likely that the antenna has moved away or the chip has been damaged.

How to protect data when using NFC

NFC is a convenient, but not the most secure technology, and the Xiaomi 9C risks include:

• 🕵️‍♂️ Reading data from tags or cards by fraudsters (for example, on public transport).
• 📱 Automatically trigger malicious scripts when touching an infected tag.
• 💳 Cloning of transport cards (unless they are protected by dynamic authorization).

To minimize the risks:

• 🔒 Turn it off. NFC, when you don't use it.
• 🛡️ Install the app NFC Secure for scanning suspicious tags.
• 📵 Do not bring your phone to unknown persons. NFC-Stickers (for example, on advertising stands).
• 🔐 For transport cards, use original media or official applications (for example, My Travel for Moscow).

If you suspect that your transport card has been sloped:

1. Block it immediately through the official carrier app.
2. Check your travel history – if there are unauthorized write-offs, contact for support.
3. Set up notifications for each trip (this is available in most transport apps).

⚠️ Attention: On Xiaomi 9C no hardware protection NFC level SE (Secure Element, like on flagship models, which means that card data is stored in less secure memory on your phone!

FAQ: answers to frequent questions about NFC on Xiaomi 9C