Reflashing Xiaomi Redmi 4A: official and custom firmware

Xiaomi Redmi 4A is one of the brand’s most popular budget smartphones, released in 2016. Despite its age, the device is still in active use due to its reliability and the ability to install modern firmware. Flashing can solve performance problems, add new features or even resurrect the device after software failures.

In this article, we will discuss all the current ways to flash Redmi. 4A — from official updates through MIUI Updater before installing custom firmware through TWRP And Fastboot, which is where we focus on the device's preparation, the bootloader unlocking, and the typical errors that users have when your smartphone starts to brake, overheat, or doesn't get. OTA-This guide will help you get your second life back.

Preparation for Flashing: What to Do Before Starting

Flashing is not just pressing a couple of buttons. Incorrect preparation can lead to data loss, device locking, or even physical damage to hardware.

• 📱 Save all the data: contacts, photos, messages. Use Settings. → Additionally. → Backup or third-party utilities like Mi Mover.
• 🔋 Charge the battery to at least 70%, interruption of the process due to discharge is fraught with serious consequences.
• 🔗 Download the right firmware. 4A (Rolex codename only files with a tag are suitable rolex_global rolex.
• 🔐 Unlock the bootloader (if you plan to custom firmware). Without this step, install via Fastboot or TWRP impossible.

Pay special attention to the choice of firmware version. For Redmi 4A, there are:

• 📦 Stable: A proven version with minimal bugs but no new features.
• 🧪 Developer: weekly updates with the latest features, but errors are possible.
• 🌍 Global/China/EU: Regional assemblies with different set of pre-installed applications.
• 🛠️ LineageOS, Pixel Experience: alternative firmware based on Android without shell MIUI.

⚠️ Note: Install firmware for another model (e.g. Redmi 4 Prime instead of Redmi) 4A) This will cause permanent damage to the system partition. Always check the device code name in the settings (Settings) → The phone. → Version. MIUI).

Method 1: Update with MIUI Updater (the safest method)

If your Redmi 4A is still on and has internet access, the easiest way to update your firmware is to use the built-in MIUI Updater app, which is suitable for installing official builds without the risk of losing data or locking the device.

Instructions:

1. Open Settings → About the phone → System update.
2. Click on the three dots in the upper right corner and select Select the firmware file.
3. Specify the path to the downloaded file with the.zip extension (for example, miui_ROLEXGlobal_V12.5.1.0.QCCMIXM_...).
4. Confirm the installation and wait for the restart (it will take 5-15 minutes).

Advantages of the method:

• ✅ Does not require unlocking the loader.
• ✅ Stores user data (unless otherwise specified in the firmware description).
• ✅ Minimum risk of error.

⚠️ Note: If, after updating, through MIUI Updater phone is stuck on startup Mi logo for more than 20 minutes, force reboot it by clamping Power + Volume up for 10 seconds. It won't hurt the device, but it can help you get out of the looped state.

Download the official firmware for Redmi 4A (rolex)

Check the battery charge (>50%)

Connect to a stable Wi-Fi

Backup of important data-->

Method 2: Install firmware through Recovery (for power users)

If a standard update doesn’t work (for example, due to a damaged system), you can install firmware through stock Recovery.This method requires manual file selection and resetting, but does not need an unlocked bootloader.

Step-by-step:

1. Download the firmware in.zip format and rename the file to update.zip (required!).
2. Move the file to the root directory of internal memory or to the SD-map.
3. Turn off the phone, then press Power + Volume up to enter Recovery.
4. Select the language, then go to Install update.zip to System.
5. Confirm the installation and wait until the process is completed (don’t interrupt!).
6. After restarting, reset via Wipe Data (if the system is unstable).

Important nuances:

• 🔄 Stock Recovery Redmi 4A Does not support custom firmware installation – only official files from Xiaomi.
• 📁 If the firmware file is called differently than update.zip, Recovery won't see him.
• 🔄 After installation, you may need to reset (Wipe Data) if you have errors when downloading.

1) The correct file name (registrar is important!).

(2) The file should be at the root of the memory, not in the folder.

(3) Try to use SD-card.-->

Method 3: Fastboot Firmware (for a complete system reinstallation)

Fastboot is a boot mode that allows you to stitch the device directly through the computer. This method is used to restore the bricks, install official firmware from scratch or upgrade to a new version of MIUI if OTA is not available. Redmi 4A requires unlocking the bootloader - without this step, firmware through Fastboot is impossible.

What you need:

• 🖥️ Computer with Windows/Linux and installed Xiaomi drivers.
• 🔌 Cable USB (preferably original).
• 📂 Firmware in.tgz or.zip format (for example, rolex_global_images_V12.5.1.0.QCCMIXM_...).
• 🛠️ Mi Flash Tool (download from the official website).

Instructions:

1. Unpack the firmware archive into a folder without Cyrillic characters (e.g., C:\Redmi4A\).
2. Turn off the phone and press Volume Down + Power to enter the Fastboot (a picture of a rabbit in a hat-eared will appear).
3. Connect the device to your PC and start the Mi Flash Tool.
4. In the program, click Select and specify the path to the folder with the firmware.
5. Select firmware mode: Clean all - complete cleaning (recommended in case of failures); Clean all and lock - cleaning + lock bootloader (dangerous!); Save user data - data storage (not always stable).

Flash

⚠️ Note: If the Mi Flash Tool is unable to find fastboot, check if Xiaomi drivers are installed (use Mi). PC Suite for automatic installation? whether the phone is connected to the port USB 2.0 (some PCs have problems with the system) USB 3.0. Disable the antivirus - it can block firmware files.

Method 4: Install custom firmware through TWRP

If you don't like MIUI, you can install an alternative firmware based on pure Android, such as LineageOS or Pixel Experience.

1. Unlocked bootloader.
2. Installed custom recovery TWRP.
3. The firmware is.zip, compatible with rolex.

Installation process:

1. Download. TWRP for Redmi 4A (For example, from twrp.me and run it through Fastboot: fastboot flash recovery. twrp-3.7.0_9-0-rolex.img
2. Boot into TWRP by clamping Power + Volume up.
3. Backup → Select Partitions → Swipe to Back Up.
4. Run Wipe → Advanced Wipe and mark Dalvik, Cache, System, Data.
5. Install the firmware via Install → Select the.zip → Swipe to Confirm Flash file.
6. After installation, swipe Gapps (if required) and Magisk (for root rights).
7. Reboot the device (Reboot → System)

The following are the best features for Redmi 4A:

• 📱 LineageOS 16/17.1: pure Android 9/10 no-nonsense.
• 📱 Pixel Experience: Google Pixel interface with monthly updates.
• 📱 Havoc-OS: flexible configuration with many features.
• 📱 crDroid: Optimized for weak devices.

💡

Custom firmware requires regular updates! without them, there can be security and app compatibility issues.

Unlocking the bootloader: a must-do step for Fastboot and TWRP

Xiaomi blocks the bootloader on all devices, including the Redmi 4A. To flash custom firmware or use the Fastboot to completely reinstall the system, it must be unlocked.The process takes up to 72 hours (due to Xiaomi's policy) and requires a Mi Account to be linked.

Instructions for unlocking:

1. Link your Mi Account to your phone (Settings → Xiaomi Account).
2. Enable USB debugging (Settings → About Phone → MIUI Version (click 7 times) → Additional → For Developers → USB debugging).
3. Download Mi Unlock Tool from the official website.
4. Launch the utility, log in to your Mi Account and connect your phone in Fastboot mode.
5. Press Unlock and wait for confirmation (you may need to wait up to 3 days).

⚠️ Note: Once the bootloader is unlocked, all data on the phone will be deleted! Xiaomi can also block unlocking if: Mi Account is new (less than 30 days). The phone was bought in China (requires a binding to a Chinese account). In such cases, use alternative unlocking methods (e.g., through the use of a EDL-regime, but it's risky).

Typical errors and their solutions

Even with the exact instructions, there can be problems, and consider the most common errors in Redmi 4A flashing and how to fix them:

If none of these methods worked, try:

• 🔌 EDL-mode: emergency firmware through a special cable (risky, requires skills).
• 📡 Contact the service: if the phone does not respond to buttons and is not determined by the PC.

FAQ: Frequent questions about Redmi flashing 4A