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According to Apple magnetic cases can cause problems with the ip4.

That's why the stopped selling magnetic cases at the apple store. (Marware switched from magnets to velcro due to that)
 
Unless things have changed, I always though magnets were a No No for electronics.
 
Seems pretty cool. Don't like having that connection point on back of the phone though. I'm very particular on how my phone looks. Wonder how big it is.
 
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