Restore your original NVRAM/EFS backup via TWRP if you made one. If you didn't, you will need to use a specialized MediaTek utility tool (like SP Flash Tool or Maui META) to re-write your phone's valid hardware IMEI numbers back to the device system. Conclusion
The Oppo A37m is a China-specific variant of the popular A37. Finding a "fixed" custom ROM usually refers to one that includes working and a Global/Multi-language interface , as the original Chinese firmware lacks these. Quick Fix Summary Target Device: Oppo A37m (MT6750 Chipset).
Look for builds specifically tagged for the MT6750 . Note that Bluetooth or VolTE might remain "broken" in early builds.
Highly valued for its lightweight nature, stability, and lack of bloatware.
: Use version v5.16 or v5.17, which is optimized for MT67xx chipsets.
Select "Firmware Upgrade" or "Download Only" from the dropdown. Power off your Oppo A37m. Volume Up and Volume Down buttons while connecting it to your PC via USB.
Custom ROMs for the A37m aim to fix critical issues found in the aging ColorOS 3.0 (Android 5.1):
Input the IMEI numbers into the tool and click . Restart your device to restore cellular network functionality. Recommended Stable Custom ROM Options
A "fixed" ROM typically refers to a modified firmware version where common bugs—such as Wi-Fi drops, camera instability, or battery drain—have been patched by the developer community.
Because the A37m is a dual-SIM 4G device, initial custom firmware often broke VoLTE (Voice over LTE) capabilities. The latest stable custom ROMs incorporate updated baseband modems that keep mobile data, SMS, and VoLTE HD calling fully operational. Prerequisites Before Flashing
If you have flashed a ROM and are experiencing bugs, these are the most common "fixes" required for this specific model:
This article is your definitive solution. We will not only list the fixed ROMs but also teach you how to fix common errors yourself, recover from soft bricks, and achieve daily-driver stability.
Our team has worked tirelessly to develop a stable and feature-rich custom ROM for the Oppo A37m. Based on Android 7.1 (Nougat), this ROM offers a range of improvements, including: