How to amplify the Wi-Fi signal on Xiaomi phone: from MIUI settings to external antennas

Have you noticed that your Xiaomi or Redmi is constantly losing Wi-Fi in distant rooms, and the Internet speed drops even near the router? The problem of weak signal is familiar to many owners of smartphones of this brand — especially on budget models like the Redmi Note 12 or POCO X5. The reasons may lie in both the software limitations of MIUI and in the hardware features of the Qualcomm or Mediatek chips that Xiaomi installs in their devices.

In this article, we’ll look at 10 proven ways to amplify Wi-Fi signals, from basic settings to advanced tricks that aren’t written about in the official instructions. Importantly, not all methods are equally effective for different models. For example, the Xiaomi 13 Pro with its flagship Snapdragon 8 Gen 2 chip can “catch” the network better than the Redmi A2 on the Helio G36, but even top-end devices sometimes require optimization. Let’s start with the simplest, and gradually reach solutions that require minimal investment or technical skills.

1. Optimizing Wi-Fi settings in MIUI

The first thing to check is hidden MIUI settings, which by default can limit the performance of the Wi-Fi module. Many users are unaware that Xiaomi firmware has a separate mode to improve network stability, but it is often disabled.

Go to Settings → Wi-Fi, tap your network name and select Change Network. Here, note two key parameters:

• 🔄 Wi-Fi mode: if you have a dual-band router (2.4 GHz) + 5 GHz), try manually specifying only 5 GHz. Despite the shorter range, this range is less crowded and gives a more stable connection.
• 📶 Bandwidth: For 2.4 GHz, select 20 MHz (reduces speed but increases stability), for 5 GHz, 40 MHz or 80 MHz (if the router supports).
• 🔒 Type of security: if your router is using an outdated router WEP or TKIP, switch over WPA2-PSK (AES) or WPA3 — That'll reduce the delays.

Also in Settings → Special Features → Network Improvement (not available on all models) you can activate the option Wi-Fi Optimization. It automatically switches the device to more stable channels, but can slightly increase battery consumption.

2. Change regional Wi-Fi settings (requires root rights)

One of the most effective, but little-known, ways to do this is to change the regional limits on Wi-Fi, because different countries have different rules on signal power, such as the U.S. allows power up to 30 dBm, and Europe only allows power up to 20 dBm. Xiaomi defaults to setting limits depending on the region of sale of the device.

To remove them, you will need:

1. Get root rights (see 4PDA or XDA-Developers forums for instructions for your model).
2. Install the WiFi Analyzer or WiFi Signal Booster app from Google Play.
3. From the engineering menu (available via code ##4636##) select Wi-Fi information → Wi-Fi frequency band and manually specify the region with maximum power (e.g., US or Japan).

Important: This method can disrupt device certification and lead to warranty issues. On models with a Mediatek chip (such as the Redmi 10C), region change is sometimes reset after a reboot.

3. Use of external antennas and signal amplifiers

If software methods didn’t help, it’s worth considering hardware solutions. Xiaomi’s current smartphones (except for some flagships) don’t have connectors for connecting external antennas, but there are workarounds:

The easiest option — USB Wi-Fi adapter with support 802.11ac (For example, TP-Link Archer T2U). Connects through OTG-It's a cable, it's an external module, minus it, it increases battery consumption and it takes up the port, and for continuous use, you'd better set up a Wi-Fi repeater that will relay the signal to the problem areas.

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If you use USB-Adapter, disable the built-in Wi-Fi module of the phone in Settings → Connections → Wi-Fi to avoid conflicts.

4. Update firmware and Wi-Fi drivers

Often, weak signal problems are solved by software updates. Xiaomi regularly releases MIUI patches that fix bugs in the operation of Wi-Fi modules, especially for new models (for example, Xiaomi 14 or POCO F6), where the first versions of the firmware may contain errors.

Check the available updates:

1. Go to Settings → About Phone → Update MIUI.
2. If there are no updates, try manually downloading the latest firmware version for your model from the official Xiaomi website.
3. To install via Recovery, rename the file to update.zip and place it in the root of the phone’s memory.

If the signal gets worse after the update, try to roll back to the previous version of MIUI.

• 🔄 Download the archive with the right firmware (for example, with the 4PDA).
• 📱 Go to Settings. → About the phone, tap 10 times on the version MIUI, to activate the Developer Mode.
• 🔧 B Settings → Additionally. → For developers, enable Unlocking OEM and debugging. USB.
• 🖥️ Connect your phone to your PC and use the Mi Flash Tool to run the old version.

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Before rolling back the firmware, back up your data through Settings → Additional → Backup and Reset. rollback can result in loss of photos, contacts and settings.

5. Set up a router for maximum compatibility with Xiaomi

Sometimes the problem isn't with the phone, but with the router settings that aren't right, and Xiaomi smartphones are particularly sensitive to the following:

• 📡 Wi-Fi channel: in range 2.4 GHz, select channels 1, 6 or 11 — They're the least intersected with neighboring networks. 5 GHz, use channels 36-48 or 149-165 (if they are maintained).
• 🔄 Channel width: for 2.4 GHz set 20 MHz (reduce interference), for 5 GHz - 80 MHz (increase speed).
• 🔒 Security mode: turn off WPS (vulnerable to hacking and use only WPA2-PSK (AES) or WPA3.
• 📶 Transfer power: in router settings (usually in the Wireless section) → Advanced: Install Transmit Power on 100%.

Beamforming (if the router supports) is also a technology that focuses the signal directly on your device, rather than dissipating it in all directions. On TP-Link or ASUS routers, the option can be called Beamforming+ or Explicit Beamforming.

Change channel to 1, 6 or 11 (2.4 GHz)|Disable WPS|Enable Beamforming|Set channel width 20 MHz (2.4 GHz) or 80 MHz (5 GHz)|Update router firmware-->

6.Alternative methods: from foil to specialized applications

If standard methods don’t help, you can try unusual solutions that sometimes give Unexpected results:

• 📄 Foil or can: Sounds like a joke, but a directional aluminum foil antenna (attached to the back of the phone) can amplify the signal on the phone. 10-15%. The main thing is to correctly orient it towards the router.
• 📱 Wi-Fi analytics applications: WiFi Analyzer or NetSpot can help you find the least loaded channel.
• 🔋 Aircraft mode: sometimes short-term on/off of aircraft mode (Settings) → Airplane mode) resets network settings and improves connection.
• 🔄 Resetting network settings: in Settings → System system → Resetting settings → Resetting Wi-Fi, mobile and Bluetooth settings can be returned to factory settings.

Another interesting life hack is using a second phone as a repeater, so if you have an old smartphone (not even Xiaomi), it can be turned into a Wi-Fi repeater using applications like NetShare or WiFi Repeater.

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For maximum foil effect, cut the parabolic shape out of it and place it so that it reflects the signal from the router to the back of the phone (where the antenna is located).

7. Checking for hardware malfunctions

If none of these methods worked, the problem may be that the Wi-Fi module physically broke down, which is true for phones that:

• 💥 Falling from a height (especially to the angle where the antenna is located).
• 💦 Contact with moisture (even if there is no visible trace of corrosion).
• 🔧 Disassembled for repair (could damage the antenna plume).

Check the operability of the module can be as follows:

1. Connect your phone to another router (such as a coffee shop or friends) and if the signal is weak, the phone is a problem.
2. Run the antenna test through the engineering menu: type ##4636##, select Wi-Fi information, and look at the Signal strength value. If it is consistently below -70 dBm even next to the router, the module is faulty.
3. Check if the top of the phone (where the antenna is located) is warming while using Wi-Fi. Overheating may indicate a short circuit.

The cost of replacing a Wi-Fi module in the service center varies from 1500 to 4000 ₽ It depends on the model. 12T Redmi Note 11 Pro repair will cost less than on flagships like Xiaomi 13 Ultra.

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If the phone is warranty, do not disassemble it yourself! contact the official service center Xiaomi - repair warranty can be free.

FAQ: Frequent questions about strengthening Wi-Fi on Xiaomi