Hi there, I recently updated my Oppo F19 Pro CPH2285 MT6779 to coloros13 (android 13) . However, I am experiencing slow performance and WiFi issues with this version. Previously, I had Android 12, which worked better, but I want to switch back to Android 11 as it is the best for this device.
I have been unable to flash it using guides from OppoStockROM, NeedROM, MTK Flash websites, and a few other tutorials. I also tried using ADB to boot into Fastboot mode, but it was unsuccessful, the device do restart when i enter adb fastboot command but my phone shows "The serial is not match, Fastboot_Unlock_Verify fail" and restart back into os. Recovery mode works with the Power + Volume Down button, but it only has options for online upgrade, format, restart, and power off. No flash tool is working.
I have enabled USB debugging and OEM unlocking (allowing the bootloader to be unlocked) from Developer Options, but that has not helped. I also tried flashing from local storage via the Software Update section using an OppoStockROM .zip file and needrom .rar file, but it gave a 'verification failed' error.
I have been unable to flash it using guides from OppoStockROM, NeedROM, MTK Flash websites, and a few other tutorials. I also tried using ADB to boot into Fastboot mode, but it was unsuccessful, the device do restart when i enter adb fastboot command but my phone shows "The serial is not match, Fastboot_Unlock_Verify fail" and restart back into os. Recovery mode works with the Power + Volume Down button, but it only has options for online upgrade, format, restart, and power off. No flash tool is working.
I have enabled USB debugging and OEM unlocking (allowing the bootloader to be unlocked) from Developer Options, but that has not helped. I also tried flashing from local storage via the Software Update section using an OppoStockROM .zip file and needrom .rar file, but it gave a 'verification failed' error.