So im spending a semester abroad in Italy and included in my program is a phone. the one they provide is a really old nokia so i unlocked my captivate and have been using their sim card in my phone. for the first 3 weeks it worked fine. calls and texts were okay. now for the last 3 days the calls arent working. if i call someone or they call me i just hear nothing. if i restart the phone the first call i make works. after that its back to the silence. the weird thing about this is that texting still works perfectly. calls are the only things that have been affected. im sure that there must be some simple explanation that im just missing cause im stressed. any help would be great. Thanks!