So I tried to use the SAM unlock to use a t-mobile sim and it wouldn't recognize the sim after plugging it into itunes many time so I decided to give up and put my Verizon sim back in. When I put my Verizon sim back in it activates I can send texts but I cant make or receive phone calls. It says something like "currently unable to authenticate your phone" can anyone help? I need my phone back!!! Thanks!