Hello, Before I submit another issue to O2 with my MMS, I'd like to see if anybody else has had a similar issue and if so, how it was sorted. I sent numerous messages to O2 requesting MMS, and finally had one back saying it was set up with the sample MMS. Then I proceeded to send an MMS to a friend, which was successfully received. Great, so today a colleague decides to send me an MMS. I wait impatiently for the first multimedia message alert on my iPhone. Instead, I receive a text message from 'Unknown', which simply reads "permanent-service-denied". So I thought it was a bit strange, and remembered that I had sent an MMS a few days back, which went through fine. So I sent an MMS to my colleague to check I could still send, and he received an MMS, but instead of from my number, it came from +447714204616. The number rang when we called it, but no answer. Any thoughts? UPDATE #1 (22-JUN-09 @ 13:50): I'll log all the stages involved for future reference if others have the same issue. UPDATE #2 (22-JUN-09 @ 13:50): Contacted O2. Further investigation required, will be calling back in the next 45-minutes. UPDATE #3 (22-JUN-09 @ 14:10): Received a call from O2. Matter will need to be looked in to further by their network investigation team. Should hear back later today. UPDATE #4 (22-JUN-09 @ 22:55): No call back from O2, may possibly hear something tomorrow. Given that, I have tried sending and receiving MMS, which appears to be working almost perfectly. However, I tried sending to another O2 iPhone, which sent successfully, yet my phone marked it with an exclamation mark saying it was not sent. I did lock it half way through sending and put it in my pocket if that makes a difference.