So my sister was in Greece this summer and wanted to use her Sprint iphone 4s over there. I called Sprint on her behalf and had them unlock the phone for her; however, she wasn't able to complete the unlock because she didn't have her computer with her and therefore couldn't do a restore. She ended up just using GV over wifi while she was there and while it wasn't ideal, she managed. Anyway, now that she's back we wanted to finish the process but since her phone is jailbroken, I didn't want to restore it. I tried using SAM to deactivate her phone but when I connected to itunes after that, we received a SIM-related error message (can't remember exactly what it was) and her phone wasn't working. I managed to get it working again by playing around with some of the options in SAM and it was working fine when I left her house last night. This morning she was on a phone call while driving and the call dropped (not unusual at all since there are some dead spots in the area); however, the phone then displayed "No Service" and it wouldn't come back up. When she got home, she connected the phone to itunes and she was prompted to activate her phone again. That went through fine and the phone is working again now; however, now she's nervous that every time her phone loses signal, she's going to have to connect to itunes to activate the phone again. Is there anything she can do to confirm that her phone will work properly from now on? Also, is there any way to check if her phone is indeed unlocked now? She said she didn't see any message about it being successfully unlocked when she activated the phone again via itunes, but it's possible that she may have missed the message. I did input her imei at http://dev.mk/iphone-simlock-status-imei-checker/ and it came back as unlocked but it would be nice to be able to try a sim from a different carrier to see if it is indeed unlocked. Any help is greatly appreciated.