Modern smartphones are no longer just devices for calls, becoming universal tools for solving everyday tasks, and the Redmi Note 9 Pro is no exception. One of the most convenient features available to owners of this device is the technology of near-to-the-spot contactless communication, known as NFC. It allows instant data exchange, connect peripherals and, most popularly, make payments with a single touch of the terminal.
Many users who buy a device from Xiaomi do not immediately find the switch in the curtain or do not know how to properly tie a bank card. This is due to the features of the MIUI shell, which hides some of the settings deeper than standard Android. In this article, we will discuss in detail all aspects of the module, from initial activation to fine-tuning security.
Understanding the wireless interface will not only help you pay faster, but also protect your data from unauthorized reading. We’ll look at the specific steps needed to turn your smartphone into a digital wallet, and discuss the nuances that are often overlooked when you first get acquainted with the technology.
What is NFC and why is it needed in the Redmi Note 9 Pro?
Near Field Communication technology provides wireless communication between devices up to 10 centimeters away. The Redmi Note 9 Pro features a 13.56 MHz module, the international standard for payment systems and transport cards. The main advantage is the speed of the connection: it happens almost instantly, without the need to pair or enter passwords.
The main use case is the emulation of plastic cards, your phone can store virtual copies of credit cards, office passes or transport tickets, and the security of this method is ensured by the fact that when you pay, the terminal does not receive the real card number, but uses a special token generated by the phone's security chip.
⚠️ Attention: Module NFC It consumes energy even when it is off if it is activated in the system, so for maximum battery power savings, it should be turned off unless you plan to use it soon.
In addition to payments, the functionality allows you to quickly transfer files, contacts or links to other devices, just hold two smartphones with the back sides to each other, and the Android Beam system (or its modern counterparts) will offer to transfer data, which is especially convenient when you need to quickly share a Wi-Fi password with guests.
Where is the module and how to enable the function
In the Redmi Note 9 Pro design, the NFC antenna is located at the top of the back cover, next to the main camera block, and this is where you need to touch payment terminals or readers. Precise positioning is important because the confident reception area is quite narrow, and a couple of centimeters of displacement can lead to a read error.
There are several ways to activate the service, and the choice depends on your smartphone management habits. The fastest way is to use the control panel, but in some versions of MIUI firmware, the icon can be hidden by default. To output it, lower the notification curtain and click on a pencil or three dots to edit the quick access buttons.
If you prefer the classic settings menu, the algorithm of actions will be as follows:
- 📱 Open the Settings app on the main screen.
- 🔍 In the search bar at the top, enter the request «NFC» momentary.
- ⚙️ Or go manually: "Connection and Sharing» → «NFC».
- 🔘 Move the slider to an active position.
Once enabled in the status bar, the corresponding icon N will appear. Now the system is ready to work with external readers. It is important to note that some banking applications may also require the activation of Google Pay or Mi Pay service depending on the region and version of the software.
Payment settings: Google Pay and Mi Pay
The process of setting up payment services requires care, because it depends on the financial security of your funds, first of all, you need to make sure that the device has all the necessary security updates from Google and Xiaomi.
To work with Google Pay (or Google Wallet in newer versions), do the following:
- 💳 Download the official app from the Play Market.
- 🔐 Log in to your Google account and add a bank card by scanning it with your camera.
- ✅ Confirm possession of the card via SMS code or a call to the bank.
- 🆔 Set the screen lock (PIN-code, pattern lock or fingerprint).
Locking the screen is a security requirement, and if the phone is not password protected, the ability to add cards will be unavailable, so that if the device is lost, the attacker cannot make a purchase.
Mi Pay works on a similar principle, but is integrated deeper into the MIUI shell, allowing you to add cards directly through the Wallet system application, but support for this service depends on the region where your smartphone is “sharpened” (Global or Chinese).
⚠️ Note: When adding a card, the bank may temporarily freeze transactions on it for verification, so always have an alternative payment method or physical card at hand.
Once successfully linked, the card becomes the default card, so you can change the priority of the cards in the app settings if you have more than one, and the system will offer the card when you bring the phone to the terminal that supports the payment system.
Use of transport and electronic keys
Redmi Note 9 Pro features emulate not only bank cards, but also transport cards and access keys, especially for residents of large cities with contactless fares, using the Mi Credit app or third-party utilities such as the MiFare Classic Tool.
The process of adding a transport card usually looks like this:
- Start the wallet or the “Mi Commissioner” app.
- Select the section "Transport cards".
- Find your city or region on the list of supported operators.
- Replenish the balance of the virtual card through a tied account.
It is important to understand that not all transport systems in the world are natively supported. In some cases, the use of emulation of a fixed-identity card (UID) is required. For advanced users, it is possible to copy physical access cards into the phone's memory, but this requires Root rights and specialized software.
Electronic keys to hotels or offices can also be added if the administrator of the system issues you a digital pass. QR-code or will be activated through NFC-It eliminates the need to carry plastic badges.
Data transfer and tagging
Besides paying, the NFC on the Redmi Note 9 Pro is great at transferring small amounts of data. Although the transfer speed here is lower than that of Bluetooth or Wi-Fi Direct, the convenience is to instantly connect without manually searching for devices.
To transfer photos or contacts:
- 📸 Open a photo or contact you want to share.
- 📡 Put your phones in the back of each other.
- 📲 Wait for vibration and confirmation beep.
- 📥 Accept the file on the receiving device.
The smartphone can also work with programmable NFC-These are little stickers or key fobs that you can program to do certain things, like, if you put your phone on a tag in your car, it can automatically turn on Bluetooth, it can start the navigator and it can start music.
Labels are written using special applications like NFC Tools, so you can tag a link to a website, text, contact details, or command to run on your phone, making your smartphone a powerful tool for automating your home processes.
Compatibility table and frequent problems
Despite the high reliability of the module in the Redmi Note 9 Pro, users can face various difficulties, most often they are associated with software conflicts, outdated versions of applications or physical obstacles.
| Symptoms. | Possible cause | Decision |
|---|---|---|
| Terminal doesn't see the phone | Wrong positioning or thick cover | Remove the case, attach the upper back to the center of the terminal |
| Error in card payment | Expired token or no Internet | Check the connection, update the bank app |
| NFC shuts down on its own | Conflict with another application or MIUI bug | Restart the device, check the permissions of the applications |
| Phone warms up by camera | Active operation of the module in the background | Turn off NFC in settings if not used |
One of the common reasons for failure is that there's a metal plate in the car's mount case, and the metal shields the signal, and communication with the terminal becomes impossible, and in such cases you have to choose between the convenience of mounting and the functionality of contactless payment.
If the problems are system-specific, try resetting your network settings, which will return all Bluetooth, Wi-Fi and NFC settings to factory values, often eliminating software failures.
☑️ Diagnostics NFC
Security and data protection issues
Security when using NFC on Xiaomi is built on several layers of protection: first, to make a payment above a certain limit (usually 1000 rubles), the system will require unlocking the device, and secondly, the card data is stored in a secure element (Secure Element), access to which only certified applications have access.
There is a myth that hackers can read card data from a distance, which is not possible with modern encryption standards, that you need physical contact or a few millimeters of distance to read, and you need to log in to the payment system. However, you should not install unknown applications that request access to the NFC-controller.
⚠️ Note: Never agree to access requests NFC from unverified applications that are not official customers of banks or transport services.
If you lose your phone, you should immediately block your cards through your bank app or personal account. Remote locking through Find My Device will also help protect your data, but physical locking of your cards is a priority.
Check the list of devices that have access to your Google account regularly. If you notice an unfamiliar device, change your password immediately and end all sessions. This is the standard digital hygiene procedure for any smartphone user.