Im in the process of getting a unlocked At&T Galaxy S II SGH-i777, and Im a Tmobile user. Currently Im using a unlocked Verizon Blackberry Storm on the network. So im no stranger to using a unlocked phone. However I had one problem with the blackberry phone, I could send and received MMS, but when I received MMS the size was decreased and pixalated so I Couldnt tell what it was. When Tmobile upgraded to 3/4G I could no longer send or receive MMS at all. I was part of the crackberry forums and did determine others had this same problem and it was because of the tmobile network.

I am wondering are there any known problems with using a the Galaxy on a different network such as this same problem I had with the blackberry?

Note, I already know about only being able to use the edge data.. But I wont be using data anyway-

I dont want any unwanted surprises after I shove out alot of $ for a unlocked phone.

Thanks to all that have input.