my iphone 3gs wont send mms's (i jailbroke and then unjailbroke a while ago)

[asaeta]

So yeah, my phone went send mms messages to anyone even though i updated to the latest iphone udpate and unjailbroke my phone a few months ago. any ideas? it almost sends it but then goes to message sending failure...

 

[iMaconApple]

i get this too..somtitmes it works sometimes it dont..i think its AT&T network cant handle all this data transfer..AT&T did say that people need to ease off the network data causing this to happen..i dont really bother with mms if its not working ill just send it e-mail..