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Re:Announcing Ubuntu Core, with snappy transactional updates by dmix on Tuesday December 09, 2014 @10:23PM (#8727515)
Clearing user or app data is not required when doing OTA updates on Android.

The partitions that get updating are completely separate from user data. This myth keeps spreading for some reason though...

The only time user data gets wiped is when unlocking the bootloader which is a very valid security feature in order to prevent bootkits and data theft. It gives big clear warnings to backup your data before doing so.

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