Edited by locksmith786 at 2026-8-20 00:17
I had almost the exact same problem while updating my UMIDIGI Power 5. I followed the recommended procedure to upgrade from the older firmware to the newer version and initially everything seemed to go fine. However, after restarting the phone, it got stuck in Fastboot mode and kept returning to Fastboot every time I tried to restart it. I tried flashing the previous firmware again, then tried the other available ROM versions, but the phone continued going back into Fastboot. I also tried keeping the user data option enabled, but that didn't solve the problem either. Eventually, what worked for me was selecting Firmware Upgrade in SP Flash Tool and flashing the latest firmware with all the required options enabled. After that, the phone finally booted normally again. One more thing that may help someone: if Windows isn't detecting the phone correctly, check the Driver folder included with the SP Flash Tool files. Installing the appropriate drivers allowed my computer to recognize the device properly. I'm sharing this because I spent quite a bit of time trying different combinations before finding something that worked. Hopefully it saves someone else from going through the same troubleshooting process.
|