How to speed up Wi-Fi on the Xiaomi Redmi 9A: from basic settings to hidden MIUI features

Slow Wi-Fi on Xiaomi Redmi 9A — a problem that every second owner of this budget smartphone faces. And the phone isn't always to blame: often, the root cause lies in router settings, an overloaded network, or even firmware issues. MIUIIn this article we will discuss 7 proven methods Speed ​​up your internet—from basic steps to little-known tricks that don't require root access.

It is important to understand: Redmi 9A equipped with a Wi-Fi module 802.11 b/g/n (2.4 GHz), which is theoretically capable of delivering up to 150 MbpsBut in practice, the speed often drops to 10–30 Mbps due to interference, outdated protocols, or background processes. We tested all methods on firmware MIUI 12–14 and highlighted those that provide a real speed boost - check each one in order.

1. Optimize Wi-Fi settings on your phone

Start with basic connection settings. Often the problem lies in the automatic settings that MIUI makes suboptimal choices. For example, the phone might connect to a congested access point instead of a freer one.

Open Settings → Wi-Fi and follow these steps:

• 🔍 Forget the network and reconnect. Extended connections to the same access point can sometimes lead to slow speeds. Click on your network name → Forget, then enter the password again.
• 📶 Disable automatic connection to weak networks. Settings → Wi-Fi → Advanced deactivate the option Auto-connection to open networks And Notify about available networks.
• 🔄 Enable Wi-Fi Priority mode. In the same additional settings, activate Wi-Fi Priority - This will force the phone to use the wireless network even when the signal is weak, instead of automatically switching to mobile data.

One more nuance: Redmi 9A uses the protocol by default IPv4, but some modern routers work better with IPv6To check this, go to Settings → Wi-Fi → Advanced → IP Settings and select IPv6 (if your provider supports this protocol).

2. Configure your router for maximum compatibility with Redmi 9A

Most Wi-Fi speed issues on Redmi 9A The problem is resolved on the router's end. The problem is that budget Xiaomi smartphones don't work well with some modern encryption standards and channels. Here's what to do:

Key parameters to change:

• 🔒 Change the encryption type With WPA3 on WPA2-PSK (AES). Redmi 9A does not always work correctly with the new standard WPA3, which leads to speed drops. In the router control panel, find the section Wi-Fi Security or Wireless Security.
• 📡 Select a fixed channel instead of Auto. Channels 1, 6 And 11 (for 2.4 GHz) are the least susceptible to interference. Use the app Wi-Fi Analyzer (available in Google Play) to find the least crowded channel in your area.
• 🔄 Disable the "Band Steering" feature, if it exists. This option automatically switches devices between 2.4 GHz and 5 GHz, but Redmi 9A does not support 5 GHz, so the function only gets in the way.

Also check if it is enabled on the router power saving mode (sometimes called Green Mode or Eco Mode). It reduces the signal transmission power, which is critical for budget phones. Disable it in the section Power settings or Power Saving.

⚠️ Attention: If your router supports MU-MIMO or Beamforming, disable these features for the 2.4 GHz network. Redmi 9A does not know how to work with these technologies, and their activation may lead to connection breaks.

3. Update firmware and reset network settings

Outdated firmware MIUI — one of the main reasons for slow Wi-Fi. Xiaomi regularly releases updates that fix bugs with its wireless modules. Check your version is up-to-date:

1. Go to Settings → About phone → System update.
2. Click Check for updates and install the latest available version.
3. After updating, please do the following: reset network settings: Settings → System → Reset settings → Reset Wi-Fi, mobile network, and Bluetooth settings.

If there are no updates but the problem persists, try roll back to the previous version of MIUI (If the speed dropped after the update). To do this:

How to roll back firmware on Redmi 9A?

1. Download the required version of MIUI from the official Xiaomi website (section "Archive").

2. Rename the file to update.zip and place it in the root of your phone's memory.

3. Go to Settings → About phone → System update, click on the three dots in the upper right corner and select Select firmware file.

4. After installation, perform a factory reset.

Critical information: There was a bug with the Wi-Fi module driver on MIUI 12.5.3–12.5.5 firmware. Redmi 9A, which caused speeds to drop to 5–10 Mbps. If you have this version, be sure to update to 12.5.6 or later.

4. Optimization of background processes and energy saving

MIUI aggressively saves battery power, limiting background app activity, including network operations. This can slow down file downloads or video streaming. To fix this:

• ⚡ Disable battery optimization for key appsGo to . Settings → Battery & performance → Battery optimization, find applications (eg YouTube, Telegram, browser) and select No restrictions.
• 🔄 Turn on performance mode. In the same section Battery and performance activate Performance mode (may be called High performance). This will disable background restrictions.
• 🗑️ Clear the cache of system applicationsGo to . Settings → Applications → Manage applications, find Wi-Fi settings And Google Play Services, then press Clear cache.

Also check if it is turned on Data Saver mode (Data Saver) in the Wi-Fi settings. It limits the background data download speed. It can be disabled in Settings → Connections and Sharing → Data Saver.

Disable battery optimization for the browser|Enable performance mode|Clear the cache in "Wi-Fi settings"|Disable "Data saver"-->

5. Using alternative DNS and VPN to speed up

Sometimes slow Wi-Fi on Redmi 9A It's not related to the signal, but to traffic routing. Providers often use overloaded DNS servers, which slows down website loading. The solution is to change the DNS manually:

1. Open Settings → Wi-Fi, click on your network and select Change network.
2. In the section IP settings select Static.
3. Into the fields DNS 1 And DNS 2 enter:

   1.1.1.1
   1.0.0.1

   (this is DNS from Cloudflare) or

   8.8.8.8
   8.8.4.4

   (DNS from Google).

If the problem is in the provider's blocking (for example, it slows down YouTube or social networks), try VPNFree options like ProtonVPN or Warp by Cloudflare They can speed up downloads by using optimized routes. However, be careful: some VPNs actually reduce speed.

⚠️ Attention: If some websites stop working after changing your DNS, reset your settings to default. This may mean your ISP is blocking alternative DNS services.

6. Hardware checks: antenna, case, overheating

Physical factors also affect Wi-Fi speed. Redmi 9A The phone has a weak antenna located at the top of the case. Holding the phone in your hand or covering that area weakens the signal.

What to check:

• 📱 Phone positionDon't cover the top of the case with your fingers. It's best to place the phone on a table with the antenna facing up (the headphone jack should be facing away from you).
• 🔥 OverheatIf the phone gets hotter 45°C, the Wi-Fi module starts throttling (artificially reducing speed). Use the app AIDA64 for temperature monitoring.
• 🛠️ Antenna damageIf the speed dropped after dropping your phone, the antenna connector may have come loose. In this case, only a service center can help.

Run a test: bring your phone close to the router (at a distance 1–2 meters). If the speed has increased by 2-3 times, the problem is sigle, not in the phone. If not, the settings or hardware are to blame. Redmi 9A.

7. Hidden MIUI settings for advanced users

IN MIUI There are hidden options that can be activated through engineering menu or ADB commands. They help when standard methods don't work.

Method 1: Engineering Menu

1. Open the app Telephone and enter the code:

   ##4636##

2. Go to the section Wi-Fi information (Wi-Fi information).
3. Look at the meaning Wi-Fi signal strength. If it is lower -70 dBm, the signal is too weak.
4. In the same menu you can reset Wi-Fi statistics by pressing Wi-Fi disable/enable.

Method 2: ADB Commands (Requires a PC)

If you're ready to connect your phone to your computer, run these commands to optimize Wi-Fi:

1. Activate USB debugging V Settings → About phone → MIUI version (press 7 times) then Settings → Advanced → Developer options → USB debugging.
2. Connect your phone to your PC and enter the following in the command line:

   adb shell settings put global wifi_supplicant_scan_interval 120

   (reduces the network scanning interval, reducing the load on the module).

⚠️ Attention: Don't change other settings in the engineering menu or via ADB unless you're sure of their purpose. This may cause your phone to malfunction.

FAQ: Frequently asked questions about Wi-Fi on the Redmi 9A

Why is Wi-Fi slow only on the Redmi 9A, while everything is fine on other devices?

This is a typical problem. Redmi 9A due to a weak Wi-Fi module BCM4329, which does not cope well with modern encryption standards (for example, WPA3) and congested channels. Solution: configure the router for this phone (see Section 2).

Is it possible to increase Wi-Fi speed on Redmi 9A using root access?

In theory, yes: with root, you can replace the Wi-Fi module driver or disable MIUI restrictions. However, in practice, this rarely provides a significant speed boost, and it voids the warranty and increases the risk of bricking your phone. It's best to try all the methods in this article first.

Wi-Fi speed drops when Bluetooth is enabled. What should I do?

IN Redmi 9A Wi-Fi and Bluetooth operate on the same chip, so using both simultaneously will reduce performance. Disable Bluetooth if you don't need it, or use wired headphones. Updating the firmware may also help (see below). Section 3).

After resetting the settings, my Wi-Fi has become even slower. What's wrong?

It's likely that your phone connected to the router using suboptimal settings (for example, it selected a congested channel). Go to your router settings and manually set the channel. 1, 6 or 11, and also change the encryption to WPA2-PSK (AES).

How to check the actual Wi-Fi speed on the Redmi 9A?

Use the app Speedtest by Ookla or nPerf. Important:

• Before testing, close all background applications.
• Connect to the router at a distance of no more than 3 meters.
• Perform the test 2-3 times and take the average value.

Normal speed for Redmi 9A — 30–50 Mbps when connected to a router at a speed 100 Mbps.