NFC in Xiaomi Poco X3: where is the antenna, how to check it and why it may not work

Xiaomi Poco X3 is one of the most popular smartphones in the budget segment, which despite the affordable price has received support for NFC. However, many users face a problem: the module is in the specs, but where exactly it is physically located is unclear, especially when buying cases with wireless charging or trying to use a smartphone to pay through Google Pay.

In this article, we will not only show the exact location. NFC-Poco antennae X3 (including modifications to Poco X3 NFC POCO X3 Pro, but we'll take it apart:

• 🔍 How to visually identify the presence of a module in your model
• 📱 Why? NFC It may not work even if you have an antenna.
• 🛠️ Can I transfer the antenna when replacing the back cover?
• ⚡ Does the cover affect the quality of the module communication?

All instructions are based on disassembling real devices and data from Xiaomi service centers, and if you plan to use your smartphone for contactless payments or smart home automation, this information will help avoid mistakes.

1.Exact location NFC-Poco antennae X3: photograph

At Xiaomi Poco X3 (model M2007J20CG) NFC-The antenna is integrated into the top of the back cover and is a thin metallized film connected to the motherboard through a flexible plume:

• 📍 The main circuit of the antenna runs along the upper edge (above the camera) and descends along the sides about 3-4 cm down.
• 🔌 The point of connection of the plume to the board is under the battery, next to the charging connector (see photo below).
• ⚠️ The antenna is not removable - it is glued to the inside of the rear panel and if damaged requires replacing the entire cover.

Important! In the Poco X3 Pro (model number M2102J20SG), the antenna is similarly positioned, but has an additional amplifying loop around the camera module to improve communication stability.

2.How to check if there is NFC in your Poco X3

Not all Poco modifications X3 fitted NFC-For example, the base version for some regions (for example, India) was released without it:

1. Model: NFC is only available in devices with NFC markers in their name (e.g. Poco X3 NFC) or model number M2007J20CG (global) / M2007J20CT (China).
2. Through settings: go to Settings → Connected devices → NFC. If there is no point, there is no module.
3. Using the code: type in the phone keyboard ##4636##, select Phone Information and check the NFC string.

⚠️ Attention: If in the settings NFC It's displayed but it's not working -- the problem may be the firmware. MIUI through settings → The phone. → Updating the system.

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If you buy the Poco X3 handheld, ask the seller to check the NFC through settings or code ##4636#. Many sellers do not specify the lack of a module in the description.

3.Why NFC can't work even if you have an antenna

If NFC is enabled in the settings, but the smartphone does not read cards or is not determined by the terminal, the reasons may be as follows:

• 🔋 Weak battery: NFC If the charge is below 15%, the module can be switched off.
• 📶 Cover interference: Metal or thick covers (especially those with magnets) block the signal.
• 🔄 Firmware failure: After update MIUI driver might fly NFC. Solution – resetting settings through Settings → System system → Resetting settings → Resetting network settings.
• 🛠️ Antenna damage: If the smartphone fell or disassembled, the antenna plume could come off (see photo in section 1).

⚠️ Attention: At Poco X3 Pro is often encountered by a bug when NFC It stops working after connecting to the Mi Band via Mi Fit, so the solution is to untie the device and restart the smartphone.

For diagnosis:

1. Install the NFC Tools app from Google Play.
2. Run the scan. If the app doesn't find the tags, the problem is the hardware.
3. Try to bring the smartphone to the terminal from different angles (the antenna can be shifted during assembly).

4. Can I transfer it? NFC-antennae when replacing the back cover

Replacement of the back cover with Poco X3 — common procedure, especially if the original is scratched or cracked. NFC There's nuances here:

• ✅ Original cover: If you buy the original back panel from Xiaomi (article) MDY10-0002-01), The antenna is already glued and connected.
• ❌ Unoriginal cover: 90% of the time, Chinese replicas don't have an antenna or are incompatible!
• 🔧 Self-transfer: It is technically possible to cut the antenna off the old lid and glue it onto a new one, but this requires a soldering iron and accuracy (risk of damaging the plume).

⚠️ Note: When replacing the cover, do not use a hair dryer with a temperature above 80°C – this can melt the glue that fixes the antenna, and it will fall off inside the housing.

5.The Impact of Cases and Accessories on NFC Performance

Many users complain that the NFC in the Poco X3 is "over and over again." 80% of the time, the problem is in the wrong accessories.

• 🧲 Magnetic cases: Magnets to fix the lid are a hindrance, especially critical for self-opening cases (e.g. Spigen Neo Hybrid).
• 🛡️ Metallic-layered armored glass: Cheap hardened glass screens the signal. Use conventional or labeled NFC-friendly.
• 🔋 Wireless charging: If you charge your smartphone on a charge with NFC (For example, Xiaomi Mi Wireless Charging Pad, there may be a conflict of modules.
• 📦 Thick bumpers: Cases more than 2 mm thick (such as the OtterBox Defender) block the signal. Optimal thickness is up to 1.5 mm.

Recommendations for the choice of a cover:

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If you use Poco X3 to pay through Google Pay, test the case in advance: bring the smartphone in the case to the terminal. If the payment does not pass the first time, the case is incompatible.

6 How to Improve NFC Stability in Poco X3

If NFC is unstable (it finds tags, it doesn’t), try these methods:

1. Update the firmware: MIUI versions below 12.5 had bugs with the NFC driver. Update via Settings → About Phone → System Update.
2. Reset network settings: Go to Settings → System → Settings Reset → Network settings Reset. This will reset the module cache.
3. Calibrate your antenna: Install the NFC Check app and follow the calibration instructions (you need to bring your smartphone to multiple tags).
4. Check the battery: If the battery is swelling, it can press the antenna plume. Visually inspect the case for the curves.

⚠️ Attention: At Poco X3 Pro after updating to MIUI 13 Some users have experienced a complete shutdown NFC. The solution - rollback to MIUI 12.5 via Fastboot or contacting a service center.

7. Frequent questions about NFC in Xiaomi Poco X3