LineageOS is the gold standard for clean Android experiences. The "fixed" versions for the A37m usually strip away the heavy ColorOS skin, significantly increasing the RAM overhead.
The first boot can take up to 10–15 minutes. Be patient! Troubleshooting Common "Fixed" Issues
Sometimes the best "custom" ROM is a modified version of the original. Fixed versions of ColorOS Global remove Chinese bloatware and fix Google Play Store compatibility issues. Original camera quality, highly stable. Status: Fully fixed for international use. Step-by-Step Installation Guide oppo a37m custom rom fixed
Most builds now have fixed RIL (Radio Interface Layer) , meaning calls and data work perfectly. 2. Resurrection Remix
If you want deep customization, this is the ROM to choose. It combines features from LineageOS, SlimROM, and OmniROM. Highly customizable UI, pre-rooted options. LineageOS is the gold standard for clean Android experiences
Flashing will wipe everything. Use a tool like Titanium Backup or move your photos and contacts to the cloud.
Power off your phone, then hold Volume Down + Power simultaneously. Be patient
If you have no signal after flashing, you may need to restore your IMEI/NVRAM backup using a tool like Mauimeta or by flashing the modem file specifically for the A37m.