I dont pixt very often so its hard to sus out what the problem is, but every now and then I get a text saying 'did you like the picture'. No pixt arrived. So I ask them to send again etc etc. Nothing. So I restart the phone and all of a sudden 3 pixts arrive.
Same deal with sending them. They wont go without a restart, most of the time.
Have discussed with vodafone, who claim it is a 'device issue' and I should speak to apple.