Unlocked Q on T-Mo - No SMS setup

[CCScan]

Hi everyone. The wife purchased a new, unlocked Q to use on T-Mobile. Everything works great, including MMS which I had to setup. She really likes the phone but is unable to send text messages. She can receive text messages but when she tries to reply it says the following errors occurred while sending and receiving messages. Your text message cannot be sent. She has to use MMS instead and its really annoying. I've searched for hours but still no solution . I can see where the SMS Service Center number is and its correct. But when I go to Settings, Connections, all I see is Dial-Up, GPRS, Proxy, and USB to PC. There is no SMS Service option there like I think should be. I am not familiar enough yet with the Q, so hopefully I am overlooking something. Thanks in advance for any help.

[drumstix116]

i also have this problem with my moto q gsm. it's unlocked so i can use sim cards from different networks. I tested 3 sim cards and encountered this problem on only 1. Not sure what the problem is though. I hope someone finds a hack or fix for this problem.