What does the NFC module in Xiaomi smartphones look like: location, photo and device

When it comes to contactless payments or data transfer between devices, the NFC module becomes a key component of a modern smartphone. In Xiaomi devices, this technology is implemented differently depending on the model and year of release: somewhere the chip is integrated into the motherboard, and somewhere it is made separately with its own antenna. But what exactly does this module look like inside the case? Where to look for it in disassembly or diagnostics? And why does some Redmi or POCO models NFC work worse than flagships?

In this article, we will discuss the physical device. NFC-Xiaomi smartphones: from the budget Redmi Note 10 to the premium Xiaomi 13 Ultra. You will see real photos of the chip and antenna, their layout on the board, and learn how to distinguish a faulty module from software problems" NFC (for example, POCO X3 Pro), where the chip is in hardware, but disabled at the firmware level.

What is it? NFC-module and what it consists of

NFC (Near Field Communication) is not a single component, but a complex of several elements:

• 🔹 Controller NFC — chip processing signals (most often from NXP Xiaomi usually uses a chip. PN547, PN80T or SN100x.
• 📡 An antenna is a loop made of thin wire or metallized plastic, located under the back cover. In budget models, it can be integrated into a battery or medium.
• 🔌 The interconnection tracks are the contacts that connect the chip to the antenna and motherboard, often causing crashes.

In Xiaomi smartphones, the NFC module can be performed in three versions:

1. A separate chip on the motherboard (for example, in the Xiaomi Mi 11) with the antenna removed.
2. An integrated chip in a SoC (system-on-crystal) as in some Redmi models with MediaTek processors.
3. The hybrid module, where NFC-controller is combined with a wireless charging chip (found in flagships with Qi-charging).

It's important to understand that even if the specifications of a smartphone are NFC, this does not guarantee its performance. For example, in the POCO X3 NFC (model M2007J20CG), the chip is physically present, but in the firmware for some regions is disabled software, you can check this through the engineering menu (#4636##) or applications like NFC Tools.

Wherever it is. NFC-module in Xiaomi smartphones: photo and diagram

Location. NFC-The chip depends on the model and the generation of the device. Below are the typical layouts for the popular series:

For example, in Xiaomi Mi 11 Ultra NFC-The module is located under a graphite pad next to the main camera, and it can be identified by the marking. NXP PN80T The antenna is a thin copper loop that encircles the middle frame of the device, and when you disassemble it's important not to damage the connecting plumes, because they're often attached to the board through a connector. ZIF (zero insertion force).

It looks like NFC-chip: appearance and marking

Visually. NFC-The module in the Xiaomi smartphones is a small chip the size of 3×3 mm 6×6 It's a little bit black or dark gray, and it's got a marking on its surface that identifies the manufacturer and the model of the chip:

• 🔧 NXP PN547 — Older chip found in Redmi 4/5 early Mi A1/A2.
• 🔧 NXP PN80T — Modern controller with support NFC 5.0 (used in Xiaomi 12 and later).
• 🔧 Broadcom BCM2079x — alternative chips found in some models POCO.
• 🔧 SN100x — Hybrid solutions for wireless charging devices (e.g. Mi Mix 3).

The photos below show the real ones. NFC-modules from different Xiaomi devices (clickable):

📷 NXP PN80T Xiaomi 11T Pro | 📷 Broadcom BCM20797 from POCO F3 | 📷 PN547 from the Redmi Note 8 Pro

Notice the chip's contact pads, which are often covered in gold or solder paste, and if you see tracks oxidizing or damaging when you disassemble, that could be the cause of NFC failure, and the circuit board usually has capacitors and resistors next to the chip that stabilize the signal.

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If the NFC stopped working after the smartphone fell, 80 percent of the time the problem is not the chip itself, but the antenna cliff or the plume disconnected. Before replacing the module, check the integrity of the antenna loop with a multimeter in vertebrae mode.

How to check the performance NFC-disassembly

Before you disassemble your smartphone, make sure it's not a software problem. Here's a step-by-step diagnostic algorithm:

If NFC does not turn on or detect devices, follow these steps:

1. Go to Settings → Connected Devices → NFC and make sure the switch is active.
2. Launch the NFC Tools app (available on Google Play) and try counting the test tag.
3. Check if the signal is blocked by a cover or metal accessories (such as a finger ring).
4. Install alternative NFC software, such as Trigger or Tasker, to eliminate errors from the standard application.

If NFC still doesn’t work after all the manipulations, the reasons may be hardware:

• 🔌 Antenna damage (often after battery replacement or back cover).
• 🔥 Chip burnout due to short circuit (for example, after moisture hits).
• 🛠️ Disconnection of antenna plume from motherboard.

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In 90% of cases, the NFC malfunction in Xiaomi is due to damage to the antenna, not the chip itself. Replacing the antenna costs 3-5 times less than replacing the entire module.

Frequent NFC malfunctions in Xiaomi and how to fix them

Analysis of service centers shows that most of the problems with NFC in Xiaomi smartphones boil down to five typical malfunctions:

One of the most insidious problems is regional locking, for example, in the Xiaomi Mi 10T Lite (model M2007J17C), NFC can be disabled in firmware for China, but work in European or global versions, the solution is to flash through the Mi Flash Tool with the right region (EEA for Europe).

⚠️ Attention: Replacement NFC-module in Xiaomi smartphones with a chip NXP PN80T You need to transfer the data of the eSE (embedded Secure Element) or contactless payments will not work.

Can I replace myself? NFC-module

Theoretically yes, but in practice it is associated with a number of difficulties:

• 🔧 Requires a soldering station with precise temperature control (chips) NXP overheating).
• 🔧 Original parts are needed – Chinese counterparts are often incompatible with the MIUI.
• 🔧 Risk of damage to eSE – if you replace it incorrectly, all bank cards will be reset.

If you are planning to do a repair, follow this algorithm:

1. Disassemble the smartphone, preheating the back cover with a hairdryer (for models with adhesive attachment).
2. Unplug the battery and find it. NFC-module according to the scheme (see section above).
3. Carefully unseal the chip using a braid to remove solder.
4. Install the new module while observing polarity (the board usually has + and - tags).
5. Check the performance through NFC Tools before full assembly.

The cost of the original NFC-Module for Xiaomi varies from 500 ₽ (for Redmi up to 2,500 ₽ (The service center will take another 1,000 to 3,000 to replace them. ₽, This ensures the safety of eSE and the efficiency of Google Pay.

⚠️ Note: In Xiaomi models with wireless charging (e.g. Mi 11 Ultra) NFC-The module is often combined with the Qi coil. When replacing one component, another component may fail.

FAQ: Frequent questions about NFC in Xiaomi smartphones