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Solved: iphone 4 error 21 and will not start - ifixit, Iphone 4 error 21 and will not start. doing this with error 21 the battery connector to restore i will get the error 21, so i google a fix and do as.

How we fixed error 21 in this iphone 4, This is showing how we fixed error 21 in this iphone that was fix error 21 iphone 7:55 how to fix iphone 4 not turning on battery issue.

Iphone not booting, error 21 when restoring, not a battery, Error 21 when restoring, not a battery so i'm pretty certain it is not a problem with the battery. there is an option to restore the iphone,.

How to fix itunes error 21 when restore iphone - unlockboot, How to fix itunes error 21 when restore iphone. 7 methods to fix itunes error 21 when you restore or update the battery from your iphone and leave it.

Iphone - error 21 even in dfu mode | macrumors forums, Iphone error 21 even in dfu mode. if we do a standard recovery mode restore we get error 21. if i put my battery in my son's iphone,.