Are you trying to flash a custom ROM on your Android device but keep running into the frustrating Error Recovery Denying OTA Because it’s SPL Downgrade message? Many users have faced this issue, especially when using the AOSP recovery provided with the ROM.
The key to solving this problem lies in understanding why it occurs in the first place. The SPL downgrade error happens when you try to flash an older version of the ROM using a newer recovery version. For example, if your recovery is from July and the ROM is from June, attempting to flash it will trigger this error.
So, how can you successfully flash your desired ROM? Follow these steps:
Step 1: Download an AOSP recovery that closely matches your ROM’s release date. If your ROM is from May, find a recovery from around that time.
Step 2: Instead of using the recovery from the ROM you’re trying to flash, opt for a recovery from another AOSP ROM like LineageOS, crDroid, or EvolutionX. Start with LineageOS and try others if needed.
Step 3: Rename the downloaded recovery file to “recovery.img” and move it to your Android SDK Platform Tools folder.
Step 4: Reboot your device into Fastboot Mode from Recovery Mode using the recovery menu or the command:
adb reboot bootloader
Step 5: Flash the recovery file using the command:
fastboot flash recovery recovery.img
Step 6: Reboot your device into the newly flashed recovery with:
fastboot reboot recovery
Step 7: In the AOSP Recovery, perform a Format Data and then do an ADB Sideload of the ROM ZIP file.
By following these steps and using a recovery close to your ROM’s build date, you’ll be able to successfully flash your custom ROM without encountering the SPL downgrade error. Remember, always backup your data before proceeding to avoid any potential loss.
Don’t let this error hold you back from enjoying the benefits of custom ROMs. With a little knowledge and the right steps, you can overcome this hurdle and breathe new life into your Android device.