I've been having this problem where I cannot
- send text messages
but I can
- receive text messages
- connect to the internet
- make calls.
I've called my network which is 3 and they have verified that its not a network problem, I've been on the phone with Apple and they are no help, its been like this for about 2 days now and its really starting to annoy me, I've master reset my phone and I've also restored it through itunes. My Iphone is a Iphone 3g