2. Insufficient memory: There are many problems caused by insufficient memory of Apple devices. The common thing is to flash back, which will be inexplicably black and the boot will always be white.
3. Jailbreak file modification: After some users' mobile phones are jailbroken, App flashback may occur. 52 Stack app is a professional novel reading artifact. This software provides a lot of novel resources, and all kinds of novels can be seen here for free.