Redmi A7 Pro 4G / POCO C81 Pro [Arctic] – Dead After Connecting to UnlockTool
Redmi A7 Pro 4G / POCO C81 Pro [Arctic] with Unisoc T7250 was found completely dead after connecting the device to UnlockTool.
Repair Done. 👍
This case involves the Arctic platform based on Unisoc UMS9230. The device was not responding normally after the UnlockTool operation and required boot-level repair to bring it back to a working condition.
Device Information
- Model: Redmi A7 Pro 4G / POCO C81 Pro
- Codename / Board: Arctic
- Platform: Unisoc UMS9230
- Chipset: Unisoc T7250
- Android: 16
- MIUI / OS: HyperOS 3.0.2.0
- Firmware Version: OS3.0.2.0.WBVINXM
- Security Patch: 2026-03-01
- Product Info: missi
- Product Device: missi
- Product Board: arctic
Firmware Details
Build: BP2A.250605.031.A3
Firmware ID:
UMS9230_UNISOC_mainline_OSv16_OS3.0.2.0.WBVINXM_BP2A.250605.031.A3_missi_Android
Software:
missi-user 16 BP2A.250605.031.A3 OS3.0.2.0.WBVINXM release-keys
Build Time: 3/23/2026 9:02:26 AM
Storage: userdata [F2FS] FBE, cache [EXT4]
Problem – Dead After UnlockTool Connection
The device became dead after connecting to UnlockTool. In this condition, the phone may no longer boot normally and can appear completely unresponsive to the usual connection or service procedure.
For Unisoc-based Xiaomi devices, correct identification of the chipset, board/codename and firmware is especially important before attempting further service operations.
Repair Result
Boot repair successfully completed. 👍
The device was recovered and the repair was completed successfully. The firmware was identified as an UMS9230 / Arctic / Missi configuration running Android 16 and HyperOS 3.0.2.0.
This case can be useful for technicians dealing with Redmi A7 Pro 4G / POCO C81 Pro Arctic devices that become dead during or after servicing with UnlockTool.
Important Notes
- Always identify the exact board, codename and chipset before attempting boot repair.
- Use firmware matching the correct device and region.
- Do not randomly write boot-related partitions from another model or firmware.
- Keep a backup of important partitions whenever the servicing method allows it.
- Different firmware revisions may require different repair procedures.
- This repair case is specifically related to the Unisoc UMS9230 / Arctic platform.
UnlockTool Dead Boot Repair
If your Redmi A7 Pro 4G / POCO C81 Pro [Arctic] becomes dead after connecting to UnlockTool, first confirm that the device is correctly detected and identify its hardware platform before attempting any further operation.
The reported device in this repair was identified as:
UNISOC UMS9230 → Arctic → Missi → Android 16 → OS3.0.2.0.WBVINXM
Repair Done Successfully. 👍
