Xiaomi Redmi 7A is one of the most popular budget smartphones released in 2019. Despite its modest specs, the device is still actively used due to its reliability and community support. However, over time, standard MIUI firmware can start to slow down, and official updates stop coming out, in which cases users resort to self-replacement of firmware — whether it is a transition to a newer version of MIUI, installing a custom recovery or even a ported Android system like LineageOS.
In this article, we will discuss all the current ways to run Redmi 7A (codename pine), including official and informal methods. You will learn how to prepare the device, unlock the bootloader, choose the right firmware and avoid errors.
Before you start, make sure your Redmi 7A has a sufficient battery charge (at least 60%) and a backup of all important data.Firmware is always a risk, but if you follow the instructions, it is minimal.
1. Firmware Preparation: What to Do Before Starting
The first and most important step is to prepare the device, and neglecting this step often results in data loss or even a smartphone failure, starting with checking the current firmware version and the status of the bootloader.
To find out the MIUI version on your Redmi 7A, go to Settings → About Phone → MIUI version. Write this information down - it will come in handy for choosing the right firmware. Also check the bootloader status:
- 🔒 Closed bootloader is standard for new devices. Requires official unlocking via Mi Unlock Tool.
- 🔓 Unlocked loader - allows you to install custom firmware and Recovery.
- ⚠️ Unknown status – if the smartphone is purchased from hand, it is better to check through the command fastboot oem device-info.
Also prepare:
- 📱 Cable USB (original or qualitative).
- 💻 Windows computer 10/11 (Unlock the bootloader and firmware through Fastboot).
- 🔋 Charger – in case the battery runs out during the process.
- 📁 Backup of contacts, photos and apps (through Mi Cloud or locally on PC).
⚠️ Note: If you are buying a Redmi 7A In China or through unofficial channels, the device may have a regional lock, in which case unlocking the bootloader through the Mi Unlock Tool will not be possible without additional manipulation.
Make sure that the model of the smartphone is Redmi 7A (pine)|Check the version. MIUI and loader status|Download the necessary drivers (Qualcomm, ADB)|Prepare a backup copy of the data|Charge your phone at least 60%-->
2 Unlock the bootloader on the Redmi 7A
Without the unlocked bootloader, you can only install official firmware through the Mi Flash Tool. Custom Recoveries (TWRP) and alternative systems (LineageOS, Pixel Experience) will require unlocking. The process takes 3 to 7 days due to Xiaomi's policy.
Instructions for unlocking:
- Link your Mi Account to your device: Go to Settings → Xiaomi Account. Make sure the phone is linked to your account (otherwise unlocking will not be possible).
- Put the debugging on. USB unlock OEM: Activate Developer Mode by pressing Version 7 times MIUI In the settings. Go back to the settings. → Additionally. → For developers and include: 🔧 Debugging by USB 🔓 Unlocking OEM
Download and install Mi Unlock Tool
- The official utility is available at en.miui.com/unlock.
- Install Qualcomm and ADB drivers (you can use the Mi Flash Tool).
- Connect your phone to your PC and start unlocking: 1. Turn off Redmi 7A. 2. Press Volume Down + Power to log in to Fastboot. 3. Connect your phone to your PC and launch Mi Unlock Tool. 4. Sign in to your Mi Account and follow the instructions.
Once you submit your unlock request, you will have to wait 168 hours (7 days) which cannot be circumvented by official methods.
⚠️ Warning: If the Mi Unlock Tool unlocks a "Couldn't unlock" error, check: Is Mi Account linked to your phone. Is debugging enabled USB and unlock OEM. Are you using the original cable? USB. Often the problem is solved by changing the port. USB on PC or disabling antivirus.
3. firmware selection for Redmi 7A
Redmi 7A can be used for several types of firmware:
| Type of firmware | Advantages | Deficiencies | Complexity of installation |
|---|---|---|---|
| Official MIUI (Fastboot/Recovery) | Stability, support OTA-update | May contain Bloatware, limited customization | ⭐⭐ (easily) |
| Custom MIUI (e.g. MIUI EU) | Advertising-free, advanced settings, weekly updates | It may be less stable than the official | ⭐⭐⭐ (middle-of-the-road) |
| AOSP-Firmware (LineageOS, Pixel Experience) | Clean Android, better performance, long-term support | Some functions may be missing (for example, IR-blaster) | ⭐⭐⭐⭐ (difficult) |
| GSI-based firmware (Generic System Image) | Universality, support for new versions of Android | Possible bugs with camera, Wi-Fi, mobile network | ⭐⭐⭐⭐⭐ (difficult) |
For beginners, we recommend starting with the official MIUI or MIUI EU. Power users can try LineageOS 20 (based on Android 13), which is well optimized for the Redmi 7A.
Where to download firmware:
- 🌍 Officially MIUI — new.c.mi.com (select the version for pine).
- 🇪🇺 MIUI EU — xiaomi.eu (weekly and stable builds).
- 📱 LineageOS/Pixel Experience — XDA Developers (Look for themes for pine).
⚠️ Note: Never download firmware from questionable sources! files with the.zip or.tgz extension must be digitally signed (checked through the TWRP Fake firmware may contain spyware or viruses.
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If you’re opting for custom firmware, look for the Android version. The Redmi 7A is best for Android 10-12 builds, as newer versions can run with lags due to the weak Snapdragon 439 processor.
4. Install official MIUI via Fastboot
The safest way to update your firmware is to use the Mi Flash Tool, which is suitable for restoring your smartphone or switching to a newer version of MIUI.
Step-by-step:
- Download the firmware in.tgz format: Select the desired version on the official website. Unpack the archive in a folder without Cyrillic characters (for example, C:\MIUI\pine).
Install drivers and Mi Flash Tool
- Download the Mi Flash Tool and install it.
- Connect your phone in Fastboot mode (Loudness down + Power).
- Sweat the device: 1. Run the Mi Flash Tool on behalf of the administrator. 2. Press Select and select the folder with the unpacked firmware. 3. Make sure that Clean all is selected at the bottom. 4. Press Flash and wait for completion (5-10 minutes).
Once the firmware is successful, the smartphone will automatically restart. The first launch can take up to 15 minutes - don't interrupt the process!
What to do if the Mi Flash Tool is in error?
5. Install custom firmware through TWRP
For unofficial firmware installation (LineageOS, Pixel Experience, MIUI EU) I'll need a custom recap TWRP. It allows you to install ZIP-files, backups and restore the system.
Instructions for installing TWRP and custom firmware:
- Download TWRP for Redmi 7A: Official version: twrp.me. or unofficial builds from trusted developers (e.g. OrangeFox).
- Install. TWRP via Fastboot: 1. Transfer the phone to Fastboot mode. 2. Connect to your PC and check the connection with the command: fastboot devices 3. Please. TWRP: fastboot flash recovery twrp-3.7.0_pine.img 4. Reboot to Recavator: Fastboot boot twrp-3.7.0_pine.img
- Install custom firmware: Copy ZIP-Firmware file on the phone (via MTP into TWRP). V TWRP Choose the Wipe → Advanced Wipe and mark: 🗃️ Dalvik / ART Cache 📁 System 📄 Data 🔄 Cache
Install
After installing the firmware, it is recommended to immediately flash Gapps (Google services) if they are not included in the build. OpenGapps (a pico or nano variant) will suit LineageOS.
1. Repeat the installation with complete cleaning (Format Data in TWRP).
2. Install a different firmware version (the current build may not be compatible with your region).
3. Check integrity ZIP-File (sometimes archives are downloaded with errors).-->
6. Solving problems after firmware
Even if you follow all the instructions, you can have problems, and let's look at the most common ones and how to fix them.
| Problem. | Possible cause | Decision |
|---|---|---|
| The smartphone is not turned on (black screen) | Incorrect firmware, interrupted process, damaged loader | Try flashing official MIUI through Mi Flash Tool in Clean All mode |
| Hanging on the MI or Redmi logo | Core conflict, lack of Gapps, incompatible firmware | Log in to TWRP, make Wipe → Format Data and re-install |
| No mobile network (IMEI lost) | EFS or modem section is damaged | Restore. IMEI through QCN-file or specialized utilities (SN Write Tool) |
| Camera or sensors are not working. | There are no drivers in the custom firmware | Install a patch for the camera or move to another build |
| Fast battery discharge | Unoptimized core, background processes | Calibrate the battery or install the core with EAS support |
If you lose your IMEI after the firmware, don't panic, it can be restored.
- Download the SN Write Tool and firmware for your region.
- Find the original. QCN-file (can be requested from the backup or from the seller).
- Fastboot: Fastboot Flash Modem NON-HLOS.bin
⚠️ Attention: Recovery IMEI It may be illegal in some countries in Russia and the EU for personal use only, but it is forbidden to distribute tools to modify the use of the tools. IMEI.
7. System optimization after firmware
Successful firmware is only half the battle, so to make your smartphone work quickly and consistently, take a few additional steps:
- ⚡ Disable unnecessary services: Go to Settings → Annexes → Autostart and disable autoboot for unnecessary programs. c Settings → Battery → Select Balanced Performance Mode.
- 🔒 Set up root rights (if necessary): To obtain root rights, install Magisk via TWRP. Hide root from banking applications with the MagiskHide module.
- 📱 Optimize performance: Install the kernel with support EAS (For example, FrancoKernel. Use Greenify to hibernate background applications.
If you have installed LineageOS or other AOSP-firmware, we recommend:
- 🎨 Set up Substratum for the themes of design.
- 🔊 Install ViPER4Android sound-enhancing.
- 🔋 Calibrate the battery with AccuBattery.
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After installing custom firmware, check the work IR-It may not work on some assemblies, so the solution is to patch it. IR Fix or return to MIUI.