A relative of mine got an iPad about a year ago and has not updated it until November after he asked me to help him with the update. We had updated it to the most recent ios possible at that time using his apple account. Later, after the update was completed, he asked me to show him the iCloud. i have logged in using my apple id to show him exactly what it is and now apparently his iPad is locked for 3 months. Has anyone hear of anything similar? Is there any fix?
I believe this is associated with automatic downloads and/or iTunes Match. See http://support.apple.com/kb/HT4627
This article makes it sound like you can only sign in with a different account every 90 days, but this doesn't seem to be the case in my experience. I regularly sign into different accounts on our family's iPad when downloading apps and this has never been a problem.
I've only gotten warnings regarding this 90-day lockout when enabling iTunes Match.
The article also notes that:
It looks like you'll have to contact Apple if you want to have the device reset.
In order that I would try: