the device you connected may be damaged and cannot be activated
i have iphone 4s locked to at&t before when i was insert non at&t sim i was getting that message
sim is not vaild (the normal message)
but now
when inserting non at&t sim its takes me to the activation then when i push
next i got
the device you connected may be damaged and cannot be activated
i restor it to a new via itunes but the same message when inserting non at&t sim
the device you connected may be damaged and cannot be activated
with the orginal at&t sim i can activate with no proplems