Xiaomi Redmi 9 is one of the most popular budget smartphones, which, despite its availability, has received many useful features, including support for NFC. However, not all users know exactly where the wireless module in this device is located, how it works and what to do if the NFC is no longer defined or is unstable.
In this article, we will analyze the physical location in detail. NFC-We'll show you the antennas in Redmi 9, we'll show you the diagrams and photos of the disassembled device, and we'll explain why sometimes the module may not be recognized by the system.
Note that in different versions of the Redmi 9 (for example, Redmi 9A, Redmi 9C or Redmi 9T) the location of the NFC may differ - in this article we are talking about the base model Xiaomi Redmi 9 (M2003J15SC) with support for contactless payments.
What is NFC in a smartphone and why you need it
NFC (Near Field Communication) technology allows you to exchange data between devices over short distances (up to 10 cm) without using the Internet.
- 💳 Contactless payments (Google Pay, Mi Pay, SberPay, etc.).
- 🔑 Identifications (electronic passes, tags for a smart home).
- 📱 Quick file transfer (Android Beam, although the feature is outdated).
- 🎫 Work with transport cards (for example, Troika in Moscow).
Xiaomi Redmi 9 NFC-The chip is built into the motherboard, but it requires an external antenna to pick up the signal, and its location is often a question for users, especially if the module stopped working after the phone fell or disassembled.
It is important to understand that NFC does not replace Bluetooth or Wi-Fi, it is designed for other tasks, for example, to pay for purchases, just hold your phone to the terminal without unlocking the screen (if you configure the Pay without unlocking function in the Google Pay settings).
Wherever NFC-Xiaomi Redmi 9 antenna: exact diagram
Xiaomi Redmi 9 (model) M2003J15SC) NFC-The antenna is located at the top of the back cover, under the plastic panel, next to the main camera, and it's a thin metal plate connected to the motherboard by a flexible plume.
To see the antenna, you need to:
- Remove the back cover (a special mediator and hair dryer are required to soften the glue).
- Disconnect the battery (required for safety!).
- Find a metal plate labeled NFC or ANT.
In Redmi 9, the NFC antenna is integrated into the wireless charging module (if supported), so it is easy to damage the back cover or battery when you replace it.
| Element | Location. | Notes |
|---|---|---|
| NFC-antenna | Top part under the back cover | Connected to the motherboard with a flexible cable |
| NFC-chip | On the motherboard (near the processor) | Responsible for signal processing |
| Connecting plume | From antenna to board | Often leaves when disassembled |
The image of the disassembled Redmi 9 shows that the antenna is located at the upper left angle (when you look at the phone from the back) and is glued to the inside of the cover, so when it is replaced (for example, after a crack), the NFC may stop working if the new cover does not have an antenna.
It looks like NFC-antenna in Redmi 9?
How to check if NFC works in Redmi 9
If you suspect that NFC-If you have a damaged antenna or a module that is not working, first make sure that the problem is not in the software part:
Make sure the function is enabled in the settings
Check for MIUI updates
Testing with another NFC-device (tag, terminal)
Try to reset the network settings
Check your phone for physical damage-->
To start, turn on the NFC:
- Go to Settings → Connected Devices → NFC.
- Activate the NFC switch.
- Make sure that the Safe Communication mode (for payments) is enabled.
If the module is not turned on or the phone can not see it, try:
- 🔄 Reboot your smartphone (sometimes helps with temporary crashes).
- 📱 Update MIUI Up to the latest version (bugs with the NFC patch-fix).
- 🛠️ Reset network settings (Settings) → System system → Reset → Resetting network settings).
⚠️ If after a fall or disassembly Redmi 9 stopped seeing NFC-The device is likely to have lost the antenna plume or damaged itself, and this will require disassembly and check of the connections.
For testing performance can be used:
- 🏦 Banking terminal (try to attach the phone to pay for it).
- 📌 NFC-tag (for example, for a smart home).
- 📱 Another smartphone with it on NFC (data-transmitting).
💡
If NFC is unstable (sees it, doesn’t), try turning off the energy-saving mode – sometimes it limits the module to save charge.
Causes of NFC Failure in Redmi 9
If NFC is out of order or out of order, it can be both software and hardware.
| Type of malfunction | Reason. | How to eliminate |
|---|---|---|
| Software | Failure MIUI, effluent | Update the system, reset the settings |
| Hardware. | Damage to the antenna or plume | Disassembly and replacement/ soldering |
| Mechanical | Back cover crack, fall | Replacement of the cover with the antenna |
| Conflict PO | Third-party applications block NFC | Delete suspicious programs |
Most often, problems arise after:
- 🔧 Independent disassembly (the antenna plume has gone away).
- 💥 Falls or impacts (damage to an antenna or chip).
- 🔋 Battery replacements (contact damage).
- 📲 Firmware updates (less often, but there are bugs).
If you have recently changed the back cover to an unoriginal one, chances are that it is missing. NFC-In this case, the module will not work, even if the chip on the board is functional.
⚠️ Note: In some service centers, when replacing the display or battery, turn off NFC-The train and forget to plug it back in. Always check the module after repair!
Can I replace myself? NFC-antenna in Redmi 9
Theoretically replace NFC-The antenna in Xiaomi Redmi 9 can be independently, but it requires accuracy and the availability of tools:
- 🔧 Plastic mediators for disassembly.
- 🔥 Fryer (to soften the glue of the back cover).
- 🛠️ Tweezers and soldering iron (if required, soldering plume).
- 🔍 Lupa (antenna and contacts are very small).
Step-by-step:
- Turn off the phone and remove it. SIM-map.
- Heat the back cover with a hair dryer (do not overheat!).
- Carefully apply the cover to the mediator, starting at the bottom edge.
- Disconnect the battery (required!).
- Find it. NFC-antenna (see diagram above) and check its connection to the board.
- If the antenna is damaged, replace it with a new one (you can buy it on AliExpress or in service centers).
- Put the phone back together.
The new antenna for Redmi 9 costs about 300-800 rubles, depending on the seller. However, if you are not sure about your skills, it is better to contact the service - damage to the motherboard with careless disassembly can cost much more.
Frequent questions about NFC in Xiaomi Redmi 9
In this section, we will answer the most popular questions about how NFC works in Redmi 9:
🔍 Why? NFC not included in the settings?
💳 Can I use Google Pay without using it? NFC?
🔧 What to do if NFC It only works after restarting?
📱 Why? NFC I don’t see the tag, but the payments work?
🔋 Does the cover affect the job? NFC?
What to do if the NFC in Redmi 9 doesn’t work
So let's summarize:
- 📍 NFC-The antenna in Redmi 9 is located under the top of the back cover, next to the camera.
- 💰 Replacement of the antenna is possible, but requires care.
If you are not sure about the cause of the malfunction, you should contact the service center. Damage to the motherboard during unqualified repairs can make the phone completely inoperable.
Xiaomi Redmi 9 supports NFC only in the basic version (M2003J15SC). In the Redmi 9A, 9C and some versions of 9T this module is not - check the characteristics of your device before trying to repair!