I have been having issues with my iPhone to the point it is really start to NOT like my iPhone...I am not quite there yet, but getting there.
Here is what happens...when people call me some calls will partially drop...which means I can hear them...but they only hear their voice echo. So I have to hang up and recall them. I also have my browser crashing every 2 minutes...which makes it useless to me.
I tried a complete restore...and nothing changed. 
So, I called ATT...they put me on with Apple iPhone support, and he told me what to do...and wow...so far...no issues. He said from the upgrades from the old software some phones have network issues...so all you need to do is reset your network and you should be fine. Here are the steps:
- Press your Settings icon.
- Select "General"
- Scroll to the bottom and select "Reset"
- Press the "Reset Network Settings" button and follow the steps.
Once my phone completed that it has been fine since.
I hope this helps some of you out there as well.
