I have an iPhone 4s, upgraded to iOS7.0 then 7.02 and each time I got a SIM failure message and the phone would not connect to Verizon. Had to power down, remove the SIM card, wait 2 min then reinstall SIM. Only then did it connect to VZN. Why is this occurring?? You buy the product and trust that it will work properly, isn't that what we're paying all this money for??