An unknown error has occurred.” Potential solutions: There is a bug in i OS 7 that allows a thief to disable the Activation Lock protection.
Workaround: This was an issue for a lot of people when the original i OS 7 update rolled out, but after updating to i OS 7.1 many users are reporting serious battery drain.
Updated i Phones and i Pads are proving slightly more power hungry than before for most people, but a few owners have encountered unusually rapid drops, with claims that as much as 50 percent of the battery life is disappearing within an hour, and that the remaining juice is draining away unusually quickly even when the device is not in use. Workarounds: A few people have run into an issue where the screen just freezes for a few seconds.
I work for an Apple retailer on the weekends, and this past weekend a cluster of customers came in with i Phones and i Pads that were in Recovery Mode — their screens displayed a globe icon and an image of a sync cable.
All of them had one thing in common: they had tried to upgrade to i OS 7.1.2 and something had gone wrong along the way.
Some, however, have run into big problems with the update — enough to brick their device.
If you haven't upgraded yet, follow these instructions before you do to help avoid problems.
Last week Apple released i OS 7.1.2, a maintenance update to i OS with some i Beacon, data transfer and Mail improvements.
Most i Phone, i Pod touch and i Pad owners have been able to update with no issues.
That way, if anything goes wrong, at least you won't lose any data.