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JA1
Samsung updates are designed to be, "no wipe". Having said that, to integrate all the different apps, user settings and customisations into the new firmware is a mammoth task. As I state in post
#2, "
Over the course of this one update we will see circa 60 million phones updated. It only needs for, say, 1 in a hundred to fail and you have 600, 000 phones that will require a Factory Data Reset." All to often, I see people blaming the firmware and stating that such-and-such an update is rubbish because their phone is malfunctioning when, in fact, it is their own user apps and settings to blame.
As per posts
#1 &
#2, backup everything using more than one method. You can then accept the update and just wipe the cache partition and if all is well, then fine. However, if not, be prepared to do a Factory Data Reset and a Full Wipe and check out your virgin phone, prior to re-downloading your apps but not settings.
Alternatively, be pessimistic and FDR and Full Wipe your phone prior to the update and wipe cache partition afterwards and then take the time to check it out prior to re-downloading your apps. That way you can determine if the fault is with the firmware or the user apps and settings.