my phone can connect to the internet send and receive text messages and emails, but every time i make or receive a call nothing happens. The phone shows that the call has been connected and times the call but i cannot hear anything and no one can hear me. I also cannot hear voice messages although the phone displays them playing. i have already tried removing the sim card and restoring the network, but i am hesitant to restore the entire phone to factory settings, and dont want to have to take it all the way to the apple store. i love the i phone but need it to actually work as a phone open to suggestions.