Modern smartphones have long since ceased to be just devices for calls, becoming universal tools for everyday tasks. One such convenient feature is NFC (Near Field Communication), which allows you to use the gadget as a bank card or a pass. However, owners of budget and mid-budget models often face difficulties in trying to find this option on the menu. Owners of Xiaomi Redmi 9 are no exception, and the question of how to activate this module remains relevant.
Before you look for a switch in your settings, you need to clearly understand the hardware limitations of your particular version of the device. The fact is that the Redmi 9 came in different versions for different markets, and the availability of a short-range chip depends on the regional version of the firmware. If your device does not have a physical antenna and controller, software activation of the function will not be possible by any standard methods.
In this article, we will look at all the nuances of working with a wireless module on this model, we will look at ways to check the presence of hardware components, the step-by-step algorithm for enabling a function in the MIUI interface, and discuss alternative solutions for those who are unlucky with the package. Understanding these details will help you avoid installing malicious software that promises to “unlock” the missing hardware.
Verification of hardware support module
The first and most critical step is to verify the availability of NFC-The module in your smartphone. Global version of Redmi 9 (model) M2004J19C), Unfortunately, the components are often devoid of the component in order to reduce the final cost of the product, while versions for other markets, such as Indian or Chinese, can have full support for the technology.
There are several reliable ways to find out the truth about your device without disassembling it. The easiest method is to visually inspect the case and box. The back of your smartphone or the packaging box must have an NFC logo on it. If there is no marking, the probability of missing the chip inside is 99%.
A more technical approach is to use system codes and diagnostic tools, so you can type in a special engineering code in the Phone app to get into the hardware testing menu, and you can see a list of all the modules available on the motherboard.
- 📱 Enter ##6484## in the dialer to log in to the engineering menu CIT.
- 🔍 Find a point in the list NFC And click on it to do the test.
- 📄 Check the build.prop configuration file through the root-rights file manager.
- 📡 Use the app. NFC Check from Google Play for automatic scanning.
⚠️ Note: If the engineering menu is an error or item NFC If you're not on the test list, it means you're physically missing the chip, and if you install third-party emulator apps, you're not going to get it, and you can get viruses.
You should also pay attention to the specifications in the About Phone menu, which sometimes indicates the model of the communication chip, but more informative will be the use of third-party diagnostic utility, such as Device Info HW. These applications read data directly from the controller and show the full list of supported technologies.
Step-by-step activation through MIUI settings
If the test confirms the module, you can switch to software activation. In the MIUI shell on which Redmi 9 is based, the control of wireless interfaces is made in a separate section. The process of inclusion is quite simple, but the location of the elements may vary slightly depending on the firmware version.
First, you need to unlock the screen and go to the main settings menu. Find the connection and networking section. In newer versions of MIUI, it can be called Connection and Sharing or just Connections. That's where all the wireless interface switches are concentrated.
Inside this menu locate NFC. Switch the slider to the active position. Once turned on, the system may suggest selecting the default card emulation app if you have multiple banking or payment system applications installed.
☑️ Activation. NFC Redmi 9
It is important to note that once turned on, the module does not always start working instantly. Sometimes it takes a few seconds to initialize the drivers. If you plan to use a smartphone for payment, you also need to make sure that the lock screen is on and the protection method is configured (PIN-code or fingerprint, as banks require it for the security of transactions.
Setting up contactless payment
Just turn on the module is not enough to make purchases. To use the Xiaomi Redmi 9 as a means of payment, you need to configure a card emulation. Depending on your region and the services available, it can be Google Pay (where it works), Mir Pay or other local payment systems.
The first step is to add a credit card to the appropriate application. scan the card with the camera or enter the data manually, then confirm the binding through the SMS-The card will then appear on the list of available means of payment.
Next, you need to set emulation priority. In the NFC settings, select Touch and Pay (or similar). Here you have to specify which application will run when you bring the phone to the terminal. For stable operation, you should choose HCE Wallet or a specific banking application.
| Setup parameter | Recommended value | Description of the impact on work |
|---|---|---|
| Positioning of the element | Centre | Determines which part of the screen emulates the card chip |
| Default application | HCE Wallet / Mir Pay | Selects a priority application for transactions |
| Demand unlocking | Included. | Requests proof of identity before payment |
| Reading mode | Included. | Allows you to read tags and tags |
When paying, apply the top of the back of your smartphone to the terminal. This is where most Redmi models have an antenna. Do not remove the case if it contains metallic elements, as they shield the signal and interfere with reading.
Using the Engineering Menu for Diagnostics
For a deeper analysis of the module, you can use the hidden CIT (Customer Interface Test) engineering menu, which is designed for service engineers, but is also useful for ordinary users with troubleshooting, accessed through a special code that runs on most Xiaomi devices.
Type ##6484## in the dialing app. You'll see a list of all hardware tests. You'll find the NFC item in the list. You click on it, you'll run a test that will try to read the test tag or just check the chip response. Successful completion of the test confirms that the hardware is working.
If the test fails to run or if it produces a Hardware not found error, it indicates a software driver failure or lack of a component, and in some cases, resetting the network settings helps, but if the problem is hardware, the software methods will be powerless.
What to do if the CIT test does not start?
You can also see the firmware version of the NFC module on the engineering menu, and write down this data if you're going to call for support, and sometimes the problem is that the firmware version of the phone and the microcode of the communication chip are not compatible.
Alternative solutions and emulation
Redmi 9 owners who don’t have a built-in module often look for ways to emulate it software, and the market is full of apps that promise to “enable NFC” on any phone, and it’s important to understand the difference between emulating access cards (for example, for intercoms) and a full-fledged payment system.
Emulator applications can work with simple UID tags by copying their ID. However, payment through bank terminals requires a secure element (Secure Element), which cannot be emulated software at the OS level for security reasons, so such applications will not allow you to pay for purchases in the store.
However, for household tasks, such as opening digital locks or reading information from tags, you can use external devices. NFC-rings and key fobs that can be worn separately, or external readers connected via the connector USB Type-C, although their functionality will be limited.
- 💳 External readers: Connected through OTG And they allow you to read map data.
- 🏷️ Copying UID: Only possible for unprotected intercom cards.
- 🚫 Payment: Software emulation of payment cards without a chip is impossible.
- 📱 Stickers: There are. NFC-Stickers that stick to your phone but require a chip to work.
⚠️ Be extremely careful with apps that require root rights to “activate” NFC». At best, they will do nothing, at worst, they will disrupt security and make it impossible to run banking applications.
Resolving problems and malfunctions
Even if you have a serviceable module, you can experience a disruption, most often problems are caused by software conflicts or physical obstacles, if the function is on but the terminal can't see the phone, try restarting the device, and this will restart the Android services that are responsible for communication.
A common cause of failure is a thick or metal case. The metal creates a screen that blocks the electromagnetic field. Take off the case and try to make payment again. Also make sure there are no magnetic car holders on the back that can operate the antenna.
If the problem persists, check system updates. Xiaomi regularly releases security patches and patches for communication modules. Go to Settings → About Phone → Update MIUI and check for new versions.
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If NFC is unstable, try to turn off and re-enable flight mode (Air Mode) and force all wireless modules, including NFC, to reconnect to the system.
In rare cases, network settings may need to be reset.This action will delete stored Wi-Fi passwords and Bluetooth devices, but can restore communication modules to work correctly.The path to reset: Settings → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth.
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The stable operation of NFC depends not only on the presence of the chip, but also on the absence of physical interference (metal cases, magnets) and the relevance of the system software.