Any idea how to fix my friend's mms problem?

[nite_monkey]

Ok, my friend and I are both on the AT&T network.
I have a pantech slate (I can send and receive mms)
My friend has a razr v3xx (He can't send or receive mms)
I was able to take my sim card and put it in his phone, and send a mms, while when his sim card is in his phone, he can't send/receive them.
I haven't tried putting his sim card in my phone yet, but I might try that tomorrow.

So my question is: Does anyone have an idea as to what the problem is, and how to go about fixing it?
My guess is it is something with his service, since when I put my card in his phone everything works fine.
I couldn't tell you if he can connect to the internet on his phone, because neither of us have a data plan, so I didn't want to try that.

[40hz]

I suspect it's more an issue with his cell phone plan than a technical issue with his Razr.

Has he ever been able to send MMS with his account? Have him check with AT&T (which I also use) and see if he is allowed to send multimedia messages with the service plan he has. Not all plans include them.

Putting your SIM into his phone switches his device to use your account, so I'm guessing that's what the problem is.

[nite_monkey]

yeah, I'm guessing it is probably something with his plan.
No, he has never been able to send multimedia messages. I'll tell him to check with AT&T.

There are plans that support only sms but not mms?