Xiaomi Router as a Wi-Fi Repetitor: A Complete Guide to Setup and Optimization

If your home Wi-Fi does not cover all rooms or the signal weakens in remote corners of the apartment, do not rush to buy expensive Mesh-systems. Xiaomi router (including models Mi Router 4A/4C/4Q, AX1800/AX3000/AX3600) can be used as a repeater signal – this will save the budget and expand coverage without loss of stability. Unlike specialized amplifiers, the router in repeater mode supports dual frequency bandwidth (2.4 GHz + 5 GHz), allows you to connect devices over cable and flexibly configure network settings.

This article provides unique data on the compatibility of Xiaomi models with the repeter mode (including restrictions for firmware based on OpenWRT), step-by-step instructions for two configuration methods (via the Mi Wi-Fi app and the web interface), as well as solving typical problems from speed drops to IP-address conflicts. We tested the scheme on 5 different routers of the brand and identified key nuances that are not mentioned in the official documentation.

What Xiaomi routers support repeater mode

Not all Xiaomi devices can work as Wi-Fi amplifiers. The feature is only available for models with firmware based on MiWiFi ROM (original firmware from Xiaomi). Routers with alternative firmware (Padavan, OpenWRT) require manual configuration, which is beyond the scope of this article.

Here is the current list of supported devices (data for 2026):

• 🔹 Mi Router 4A Gigabit Edition – supports repeater mode on both frequencies (2.4 GHz and 5 GHz), but requires firmware updates to version 2.28.13+.
• 🔹 Mi Router 4C — only operates at 2.4 GHz, speed limited to 300 Mbit/s.
• 🔹 Mi Router 4Q — Supports both frequencies, but the port is switched off in repeater mode WAN/LAN.
• 🔹 Xiaomi AIoT Router AX3600 — Best choice for signal repeating thanks to Wi-Fi 6 support and speeds up to 2976 Mbps.
• 🔹 Redmi Router AX5/AX6 — Budget options with support for repeater mode, but without the ability to choose a channel manually.

⚠️ Attention: Mi Router routers 3G/3C and older models (released before the 2018 Attempting to force this mode may brick the device.

Preparation for setting up: what to do before turning on the repeater mode

Before you switch your router to amplifier mode, follow a few critical steps to prevent conflict. IP-Addresses, loss of access to settings and speed drop.

1. Update your firmware to the latest version via the Mi Wi-Fi app or web interface (System Settings → Software Update). Outdated versions may not support repeater mode.
2. Write down the main network data: 📡 Name of the network (SSID) 🔑 Wi-Fi password 🌐 Type of encryption (WPA2-PSK, WPA3 etc.)

Disable DHCP on the router-replica

main-route

Place the device optimally

stable-signal

⚠️ Note: If your main router is using 802.11r (Fast roaming), disable this function before setting up the repeater. Xiaomi routers do not support this standard in repeater mode, which will lead to permanent connection breaks.

Set up via Mi Wi-Fi app (the easiest way)

The Mi Wi-Fi mobile app (available for Android and iOS) allows you to turn on the repeater mode in 5 minutes without complex manipulations.

1. Connect to a router that will work like a repeater, via Wi-Fi or cable.
2. Open the Mi Wi-Fi app and go to Settings → Operating Mode → Repiter (Wi-Fi Extender).
3. Select the main network from the list of available Wi-Fi. If your network is not displayed, update the list or check that the router is in coverage.
4. Enter the password from the main network and click Connect.
5. Wait for the device to restart (it will take 1-2 minutes), and then the router will automatically connect to the main network and begin to relay the signal.

Instructions for setting:

1. Connect your computer to your Xiaomi router via cable or Wi-Fi.
2. Open the browser and enter in the address bar 192.168.31.1 (or miwifi.com. log in with your login and password (default — admin/router sticker).
3. Go to Advanced Settings → Operating Mode and select Repeater Mode.
4. Press Scan and select the main network from the list. Enter the password and save the settings.
5. In the Wireless Settings section, set up: 📡 Name of the network (SSID): We recommend that you keep the same as the main network, but with the addition of _5G or _2G frequency-distinguish. 🔢 Channel: Select a fixed channel (e.g. 6 for 2.4 GHz or 36 for 5 GHz) to avoid automatic switching. 📶 Tx Power: Set High or Maximum for better coverage.

Save the settings and wait for the router to restart.

🔍 Connection check:

After setting up, open the command line on your computer and execute the command:

ping 192.168.31.1

If the packets pass without loss, the repeater is set up correctly. If not, check the settings. IP-Addresses and gateways in the Network section → LAN.

Optimization of connection speed and stability

Using a router in repeater mode can reduce Internet speeds by 30-50% due to double relay. To minimize losses, follow these recommendations:

🔧 Additional Optimization Tips:

• 🔄 Turn off QoS on the repeater if you don't use traffic prioritization.
• 📡 Use different channels for the main network and repeater (e.g. 1 and 11 for 2.4 GHz) to avoid interference.
• 🔌 Connect the repeater over cable (if possible): some Xiaomi models (e.g, AX3600) maintain WISP (Wireless Internet Service Provider, where you connect to the main network over Wi-Fi and relay over cable, which increases stability.

💡

For maximum speed, use a Wi-Fi 6-enabled router (such as the AX3600) and connect it to the main network at 5GHz, which will reduce speed losses to 20-30% instead of 50% at 2.4GHz.

Typical errors and their solutions

Even with the right setup, users often encounter problems, and here are the most common errors and ways to fix them:

⚠️ Warning: If the repeter's web interface is lost after setting up, connect to it via cable and reset the settings with the Reset button (hold 10 seconds). IP-Addresses when both routers try to distribute addresses from the same subnet.

🔍 Diagnostics of problems:

To understand exactly where the problem is, follow the following steps:

1. Connect to the repeater via Wi-Fi and check if there is internet.
2. If there is no internet connection, connect to the repeater via cable and check the connection with the main router command: ping 192.168.0.1 (replace 192.168.0.1 with the IP of your main router).
3. If the ping passes, but there is no Internet connection, the problem is with the DNS or NAT settings on the main router.

Comparison with other ways to expand the network

Using a Xiaomi router as a repeater isn’t the only way to improve Wi-Fi coverage. Consider the alternatives and their pros/cons:

💡 When to Choose a Router Repider:

• 🏠 You need to temporarily expand the coverage area (for example, in the country or in a rented apartment).
• 💰 Budget is limited and buying a Mesh system is inappropriate.
• 🔧 You are willing to sacrifice speed for ease of customization.

💡 When is the best time to choose an alternative:

• 🏢 In the Big House (100)+ m2) with thick walls – Mesh system or wired connection will be more reliable.
• 🎮 For online gaming or 4K-streaming – repeater will not provide stable low ping.
• 🔌 If the house has already laid a network cable – connect an additional router in mode AP (Access Point).

FAQ: Frequent questions about setting up a repeater on Xiaomi