NFC on Xiaomi Redmi 9: setup and use

Many budget smartphone users often wonder about the availability and functionality of the NFC module in their device. Xiaomi Redmi 9 is a popular model that causes a lot of controversy regarding equipment. Owners want to know whether you can use the phone for contactless payment or quick pairing with accessories.

The answer to this question is not as clear as it might seem, because there are several versions of the device released for different markets, the global version and the version for China can differ significantly in the set of internal components, including wireless communication interfaces.

In this article, we will discuss in detail how to determine if your particular Redmi 9 instance has Near Field Communication support, we will look at software activation methods, hardware verification methods, and alternative solutions if a full-time module is not available, and we will provide tips on how to safely use this technology.

Check for NFC Module in Redmi 9

Before you start setting up, you need to make sure that the chip is physically present. The NFC module is a hardware component that cannot be installed software unless it is built in by the manufacturer in the factory. In the case of Redmi 9, the situation is as follows: the Chinese version (CN) is equipped with a module, and the global (Global) often does not have this feature.

The easiest way to check is to visually inspect the case and box, and the back of the smartphone, usually at the top, can be marked with the "NFC" logo, and the presence of the chip is often indicated on a sticker glued to the box from under the device, next to the memory specifications and color.

If there are no external signs, you should check the system settings. The absence of a switch in the menu does not always guarantee the absence of a chip (sometimes it is a software bug), but its presence confirms the functionality of the module. In some cases, the firmware may hide the function for certain regions.

⚠️ Note: If there is no item in the settings menu NFC, There is no logo on the case, with a 99% probability that your Redmi 9 global version of the chip is physically missing.

For a deeper check, you can use third-party diagnostic tools, applications like AIDA64 or Device Info HW read the list of installed equipment directly from the system, and they will show the presence of a sensor even if the standard MIUI interface hides this option.

Activation of the function in MIUI settings

If you're convinced that the module is present, the next step is to activate it. The standard way to turn it on in the MIUI shell is this: you open the Settings app and find the Connection and Sharing section. This is where the major wireless interface switches are concentrated.

In the list that opens, look for a paragraph "NFC". Move the slider to the active position. Once turned on, the system may offer to configure additional options, such as Android Beam (for transferring files) or card emulation mode "HCE Wallet".

There's also a quick way to activate through the control panel. Swipe from top to bottom to open the notification curtain, and find the NFC icon. If there's no icon, tap on a pencil or edit button to add a shortcut to a prominent place. This will allow you to turn the module on and off in one touch, which is convenient for saving battery power.

Importantly, once the module is turned on, the phone will start constantly scanning the space for tags, which may have a slight effect on autonomy, so if you're not using the feature right now, it's best to keep it off.

Setting up contactless payment

The main use case for the technology is payment for purchases in terminals. To work on Xiaomi Redmi 9, you need not only a module, but also an installed bank application or payment system. In the face of restrictions on Google Pay services in some regions, users often turn to alternatives.

The process of adding a card is standard: you open the bank application, select the card section and follow the link instructions, the system will request proof of identity and possibly send a SMS code, after successful binding, the card will appear in the list of available funds.

• 📱 Make sure that in the settings NFC The default payment application is selected (e.g. Google Pay or Mir Pay).
• 🔒 The screen of the smartphone must be unlocked to make a transaction (the fingerprint scanner or Face is working). ID).
• 💳 Apply the top of the back of the phone to the terminal at a distance of no more than 4-5 centimeter.

Payment security is tokenized, which means that your real card number is not transferred to the terminal, instead using a unique digital token, and even if the data is intercepted, attackers will not be able to recover the card number or the number of the card. CVV-code.

Using NFC to Transfer Data and Tags

In addition to payment, the technology allows data to be shared between devices. Android Beam (or its modern counterparts in newer versions of Android) allows you to transfer contacts, links to sites or small files with the simple touch of two smartphones.

Redmi 9 can also read programmable NFC tags, which can be bought separately and programmed to perform certain actions, such as when you hold your phone to a desktop tag, your smartphone can automatically switch to silent mode or start the navigator.

To work with tags, you need a special application, such as NFC Tools, which allows you to read the contents of the chip and write new information to it, which can be text, a link to the Wi-Fi network (for guests), or a command to launch an application.

Using tags to automate is a powerful productivity tool, so you can create a home tag that turns on Wi-Fi and lowers the brightness, or an In-the-Car tag that triggers Bluetooth and navigation.

Problems with detection and their solution

Sometimes users are faced with a situation where the module is, but it does not see the maps or terminals. Often the reason is a thick case or a metal plate on the back (for example, for a magnetic holder in a car).

Another common problem is a software failure of the NFC service, in which case a simple reboot of the device helps, and if that doesn't work, try resetting the network settings, which will return the Bluetooth, Wi-Fi and NFC settings to factory values without affecting personal files.

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If NFC stopped working after the firmware update, try clearing the Settings app cache and the NFC system service from the Apps menu -> All Apps.

In rare cases, the problem lies in the damage of the antenna module after falling or getting moisture. If the software methods do not help, and the case is removed, you may need to diagnose in the service center.

Alternatives in the absence of a module

If you check it out that your Redmi 9 doesn't have a built-in chip, you don't have to worry. There are external solutions that allow you to add functionality — NFC-stickers or key fobs that connect through the charging connector (USB) Bluetooth, although the latter are rare and expensive.

A more practical option for payment is to use a PayPass or PayWave card, or a smart ring and a technology-enabled bracelet, which takes over the emulation function, freeing the smartphone from this task.

Technology can also be used to transfer files QR-codes or direct transmission over Wi-Fi Direct (function "File Transfer" to the MIUI). The transmission speed will be even higher than through NFC, Although it requires a preliminary connection setting.

⚠️ Note: Do not try to disassemble the smartphone for self-installation of the antenna NFC. Redmi 9 doesn’t have a matching connector on the board, and an intervention will take away your warranty and could knock your device out of order.

Using third-party apps that promise to "emulate NFC" on chipless phones is a myth. The software cannot replace a physical radio module running at 13.56 MHz.

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NFC is primarily a hardware function, and if a manufacturer has not installed a chip in a budget model, it is not software-based to add it, external accessories are required.