I've just purchased a Nokia Lumia 520, and I'm not able to send a photo in a text message, even though the service says I should be able to. Full bars, full wifi, it simply won't send. Any suggestions on how to fix that?
Do you have data disabled? If so, that is why. There needs to be an active data connection in order to send/receive picture messages. WiFi WILL NOT suffice. You could have data enabled, be on WiFi and send/receive picture messages.