Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
I'm in Houston, Texas, with 3.1 and the 5.1 ipcc. I have the MMS icon but the messages fail every time. I've reset twice but it's still a no go. Oh well. I can wait a little while longer, haha.

Oh, I have the family messaging plan, too.

I first reset my carrier settings and the did a hard reset on my phone. Try that.
 
I got the MMS I sent myself after applying the carrier hack. I'm getting a friend to do the same and see if it works for the both of us.
 
3.1/5.1 working here in Ventura County, Ca. It started working after I changed my text plan to the family unlimited plan.
 
West Hollywood, CA

On 3.0.1 with 5.1 carrier file.

NO GO
I have an individual iPhone MMS plan.
PS: AT&T Service is really awful around here. I can't get calls in my apartment unless the phone is sitting on the window sill.
 
UPDATE: I just updated to 3.1 and used the 5.1 ipcc. MMS still works but Tethering is gone 🙁

I'm thinking of trying to downgrade to see if I can get it back. I'd definitely rather have Tethering than MMS.
 
Ok...do you mind sharing the steps you used?

I updated to 5.1 and reboot iphone. After reboot MMS & Tethering work but VVM broke. I went into

Settings > General > Network > Cellular Data Network

Change the APN for voicemail from acds.voicemail to wap.cingular and reset network, reboot iphone then visual voicemail work again. Give it a try...
 
how did

I updated to 5.1 and reboot iphone. After reboot MMS & Tethering work but VVM broke. I went into

Settings > General > Network > Cellular Data Network

Change the APN for voicemail from acds.voicemail to wap.cingular and reset network, reboot iphone then visual voicemail work again. Give it a try...

you get the 5.1 update on the phone?
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.