I recently bought a magnetic case for my iphone and on the day I did my iphone mysteriously had a message that said "Repair need: cannot make or recieve phone calls." I brought it in to the Apple store and they rplaced it for me not knowing why this would have happened. the second phone worked fine just as the first one did. I did not use the case for the next few days because I had off from work and only carry it in the case when I am working. Within 2 hours of having it in the case today at work, I pulled the phone out and it had the same message. Has apple said anything about not using magnetic cases? It has to be related to my phone dying twice. Has anyone else had this problem?