A: The A37m does not have a user-unlockable bootloader like Pixel or OnePlus. Flashing via EDL does not touch the secure boot. You are safe.
Explain how to if it gets lost during the flash. oppo a37m china to global firmware
In the SP Flash Tool, ensure "Download Only" or "Firmware Upgrade" is selected (avoid "Format All" as it may erase your IMEI). button to start the process. A progress bar will appear. Once finished, a Green Ring (OK) will show on the screen. A: The A37m does not have a user-unlockable