Technical Report: Using SP Flash Tool on OPPO A37m
B. Fixing Null IMEI (Emergency Calls Only)
Always backup your NVRAM (IMEI data) first if possible.
Use Firmware Upgrade unless absolutely necessary.
Keep a copy of the stock firmware on your PC for future issues.
Disconnect your Oppo A37M from the computer.
Reboot your device by pressing and holding the Power button.
Run SP Flash Tool as Administrator.
Click Scatter-loading → select the scatter.txt from firmware folder.
Check settings:
Step 3: Choose the Correct Download Mode (The "TOP" Secret)
System Upgrades/Downgrades
: Manually installing specific firmware versions, such as converting from a Chinese ROM to a Global ROM. Essential Requirements To successfully flash the , you must gather several critical components:
Ensure the OPPO A37m has at least 50% battery.
Back up contacts, photos, and files—flashing wipes everything.
