Happy S3 user here. Just one problem that I seem to encounter fairly regularly.

When driving I try to make a call and I get an error message that the network is not available. I have to try the call again and sometimes several times. Finally the call can be made.

I have read here and in other S3 forums that the antenna on the S3 is not the best. Could this be the problem that is causing this error? I usually keep my phone in my murse and it sometimes is on the floor of the car.

Any help will be appreciated.