Have you checked your mms settings? My Pre2 (tmobile) put them in automatically, but my friend's pixi (also on tmobile) didn't. I put my settings into her phone, and it started working.
Originally Posted by Tatohead
To get to the MMS settings (in case you don't already know), open the phone app menu, then Preferences & Accounts, Then scroll down to Network .. flip the "manual settings" switch, then Edit Network Settings, and select the tab for MMS APN.
The settings my phone filled in for me automatically:
Max limit: 300
Note, with these settings your phone will tell you it's an invalid apn. If you tell it to set it up anyway, it works just fine. Proxy was blank, though I tried filling in the tmobile proxy of 126.96.36.199:8080 and it continued working.
I talked to a tmobile guy, who also confirmed these settings. He also gave me alternate settings, which I tested and they worked as well, and these settings do not tell you that it's an invalid APN:
Max limit should be set to 300, according to the tmobile guy I talked to. I tried setting it much higher, made no difference.
Username and password should be blank, after restarting it will fill in "hs_null" for username and some starred out password.
I've only ever been able to receive tiny thumbnail images (even images well under 300kb), though I can send full size images just fine. No one seems to have a fix for the receiving of tiny images. Tmobile isn't the culprit as far as I can tell (at least according to the tmobile guy I talked to), but the webos help people are really no help at all.. After asking me the same 3 questions over and over and over again, they suggested a full erase of my device. They completely ignored me telling them the fact that this happened on my current Pre2 and my first Pre2 that I ended up having to exchange (vibrate wouldn't work and the keypad backlight was bad), that it happened both before and after running the webos doctor (for other issues). It also happens on my friend's pixi, also on tmobile.
Oh well, at least I can see little tiny thumbnail images, and I can send images just fine.
I hope this helps..