Xiaomi Redmi Note 7
Developer mode
In this article, we will discuss how to safely activate developer modes, unlock the bootloader and install alternative software. You will learn what tools you need, where to download official Xiaomi utilities, and how to avoid typical errors. Importantly, all manipulations you perform at your own risk - some actions can cancel the warranty or lead to irreversible consequences.
If you’re new to Android moding, don’t be intimidated by terms like fastboot, TWRP or ADB. We’ll explain everything in simple language, with step-by-step instructions and visual cues. For experienced users, this article will contain nuances specific to Redmi Note 7 (codename lavender), including the features of working with Android 9/10 firmware and problems with anti-rollback.
1. Activate Developer Mode on Redmi Note 7
The first step to modifying a smartphone is to enable a hidden menu for developers, which allows you to debug the device via ADB, unlock OEM Unlock, and adjust settings that are not available in the standard MIUI interface.
To activate, go to Settings → About Phone and tap the MIUI Version seven times quickly. After that, a new section for developers will appear in the main settings menu. Attention: on some versions of the firmware, the path may differ - if there is no MIUI Version, look for the Build Number or Android Version.
Inside the developer menu, include the following options:
- 🔓 Unlocking OEM — mandatory to unlock the bootloader (it may be necessary to link the Mi Account).
- 🖥️ Debugging by USB — Allows you to control the device from a computer through ADB.
- 🔄 Do not turn off the screen during charging – convenient for long operations.
- 📱 Include an error log – help diagnose problems after modifications.
⚠️ Note: Some Xiaomi firmware options OEM Unlock may disappear after a reboot, due to the brand's security policy.If the button is gray and inactive, connect the device to the Internet and wait for sync with Mi servers (can take up to 7 days).
2 Unlock the bootloader: the official way from Xiaomi
The bootloader on the Redmi Note 7 is locked by default, and unlocking it is a must for custom firmware or restores (TWRP) installation. Xiaomi provides the official Mi Unlock Tool, but the process is nuanced:
1. Mi Account Link: The device must be linked to the Xiaomi account for at least 7 days. Without this, the Mi Unlock Tool will not allow unlocking.
2.Pending confirmation: Once a server unlock request is sent, Xiaomi may delay the response up to 360 hours (15 days) This is a measure against mass unblocking.
3. MIUI Version Restrictions: Firmware older than MIUI 12 may require additional confirmation via SMS.
Download Mi Unlock Tool from the official website (the version should match your firmware!). Launch the utility on a PC with administrator rights, log in under the same account as your phone, and follow the instructions. The device should be in Fastboot mode (clip Power + Volume down when the phone is off).
Link Mi Account to phone | Enable OEM Unlock and USB | Download Mi Unlock Tool of the latest version | Make sure that the PC has ADB/Fastboot drivers | Connect the phone to the PC in Fastboot-->
⚠️ Attention: Unlocking the bootloader will completely reset the device to factory settings. backup data via Mi Cloud or locally on your PC. Also note that once unlocked, Xiaomi's warranty is cancelled.
3. TWRP Recovery Installation: Alternative Recovery
TWRP (Team Win Recovery Project) is a custom recovery that replaces the standard MIUI Recovery, which allows you to install informal firmware, backup the entire system and restore it. There is a stable version of TWRP for the Redmi Note 7 (lavender), but installing it requires caution.
Step-by-step:
- Download the latest TWRP image for lavender from the official website (file with the extension.img).
- Rename the file to twrp.img and place it in the folder with ADB on your PC.
- Connect your phone in Fastboot mode and execute the command: fastboot flash recovery twrp.img
- Immediately after the firmware, go to TWRP, holding Power + Volume up. If you skip this step, the standard MIUI Recovery will reset TWRP.
In TWRP, the first thing you do is make a full backup of the Boot, System, and Data partition, which will save you if you have a bad firmware, and it is also recommended that you disable firmware signature check in the TWRP (Settings → Disable DM-Verity) settings, otherwise custom firmware may not start.
What to do if TWRP does not start?
4. Install custom firmware: from LineageOS to Pixel Experience
Once you unlock the bootloader and install the TWRP, you can flash alternative software. Popular options for the Redmi Note 7:
- 📱 LineageOS – “pure” Android without shell MIUI, long-renewed.
- 🎨 Pixel Experience – firmware with the interface and features of Google Pixel.
- ⚡ Havoc-OS - customizable firmware with many settings.
- 🔄 MIUI Europa - Optimized version MIUI softwareless.
Critical moments in firmware:
1. Anti-rollback: Xiaomi blocks rollbacks on older firmware. If you stitch through software with a lower anti-rollback index, the device locks. TWRP, file-open /proc/anti_rollback or through the team:
adb shell getprop ro.vendor.build.anti_rollback2. Formatting data: When transitioning from MIUI on AOSP-Firmware (for example, LineageOS) must run Format Data in TWRP, Otherwise, the system won't start.
3. GApps: LineageOS firmware does not come with Google services. Download the appropriate Open GApps package (arm64 version, Android 9/10) and run it right after the main ZIP.
| Firmware | Android version | GApps required | Features |
|---|---|---|---|
| LineageOS 18.1 | 11 | Yes. | Stable, but without branded Xiaomi features (for example, IR port) |
| Pixel Experience | 12 | Yes. | The interface is like on the Pixel, but there are possible bugs with the camera |
| MIUI Europa | 12.5 | No. | Optimized for Europe, without Chinese apps |
| Havoc-OS 4.9 | 11 | Yes. | Maximum customization, but high battery load |
💡
Before you run your firmware, check kernel compatibility! Some custom firmware requires a separate kernel. For example, the Pixel Experience on the Redmi Note 7 may require a kernel from LineageOS. Check this out on the XDA-Developers forum in your firmware topic.
5 Risks and How to Avoid Them: Anti-Recoil, Brick, Loss of IMEI
Smartphone modifications are always associated with risks, and here are the most common problems and ways to prevent them:
1. Anti-Rollback Protection: If you flash a firmware with a lower anti-rollback index, the phone will stop loading, showing the Anti-rollback check fail error. There is no solution - only a replacement motherboard. Always check the index before firmware!
2. Brick: The device does not turn on, does not respond to buttons.
Interrupted firmware (for example, the battery sat down).
Incompatible firmware (for example, firmware from Redmi Note 7 Pro on Redmi Note 7).
- Damaged boot or recovery section.
Mi Flash Tool
EDL
3. IMEI loss: Sometimes the network disappears after the firmware. This is due to damage to the modem partition. You can restore the IMEI via TWRP by running the nvram and modem files from the stock firmware. You can look for instructions on XDA or 4PDA.
⚠️ Note: If you sell or transfer a phone after unlocking the bootloader, be sure to return the stock firmware and lock the bootloader back. Otherwise, the new owner may face problems when upgrading via the bootloader. MIUI Updater.
6. Post-firmware optimization: battery, performance, camera
Install custom firmware is half the battle, and to keep it running smoothly, follow these steps:
1. Battery calibration: After firmware AOSP-Firmware (e.g. LineageOS) reset battery statistics:
- Charge the phone to 100%.
In TWRP, clear batterystats.bin (Data section).
Discharge to 0% and recharge to 100% without interruption.
Performance adjustment:
In LineageOS or Havoc-OS, enable Performance mode in the processor settings.
Use utilities like Game Booster (available in Magisk) for games.
- Turn off animations in Settings → System → Developer settings (set animation scale to 0.5x).
Improvement of the camera:
AOSP-based firmware often uses Google Camera (GCam). Download the version from Urnyx05 or BSG with configured config for the Redmi Note 7.
- For MIUI-firmware set the mods ANX Camera or AospExtended Camera via Magisk.
- 🔋 Magisk: A tool for root rights and module installation. Download the latest version from GitHub and run through TWRP.
- 🛠️ Xiaomi.eu Tool: Script for automatic cleaning of unnecessary applications MIUI (works only MIUI Europa).
- 📸 GCam Configs: Google Camera Settings Optimized for Sony Sensor IMX486 Redmi Note 7.
💡
After installing custom firmware, the device can warm up and discharge quickly for the first 2-3 days. This is normal — the system indexes files and optimizes work. If the problem persists longer, check the kernel settings or go back to the stock firmware.
7.The Return to Stock Firmware: How to Reverse Back
If custom firmware is unstable or you want to return the warranty, you can restore the original MIUI. This will require an official Fastboot ROM for your model.
Instructions:
- Download Fastboot ROM for Redmi Note 7 (lavender) from the official website. Choose the latest stable version.
- Unpack the archive into a folder with no path gaps (e.g., C:\MIUI\).
- Connect your phone in Fastboot mode and launch the script flash_all.bat (for Windows or flash_all.sh (for Linux/Mac).
- Wait for the process to be completed (it will take 5-10 minutes) and the phone will automatically restart.
If you want to block the bootloader back, use the command:
fastboot oem lockWarning
Xiaomi
After returning to stock firmware, it is recommended to reset via Settings → Additional → Restore and Reset to avoid conflicts with residual custom software files.