i recently got an iphone 2g and unlocked/jailbroke it with os 3. i'm using it on tmobile, and all features seem to be working fine, except that i can't sent texts if i am connected to a wifi network with no phone reception (works fine if i do have reception, however, there's no reception at my house so this was pretty important to me). i just get the red exclamation point and tells me to try again. since i haven't used it before, maybe i am mistaken and this is something i can't actually do through wifi when using tmobile, but i don't see why i shouldn't be able to if people do it using at&t (and tmobile users with tmobile phones can...)? wifi is working for everything else without phone reception, just not texting. is there a setting somewhere i'm missing or something?

thanks :]