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This shouldn't be happening - All i can suggest is a factory reset or a system repair which should fix this as it sounds like something hasn't quite been configured and is doing it every time is boots up
Also experiencing the " android is upgrading " problem, please help us, just having an M4 Aqua Dual E2312 for 2 weeks.Before having this " android is upgrading " problem, my device suffered from frequent restart because of SD card, after removing the external storage, the problem stopped. Now suffering the. " android is upgrading ", I guessed that the root of this problem is the same.