thank you for your reply, somehow my iphone has a problem because when I try to insert my sim in other phone the network is ok and I can send/received sms immediately and normal but when I return it to my iphone same scenario happen but I'm confused because I can make a call and received incoming calls in a normal way.
I'm wondering if this is possible for the iphone 4s? I can make a call but I can't received/send sms?
is it the antenna for messaging has a problem?
please help me.