Thanks for the quicke reply and the idea . I just checked her phone and interestingly she is the only one of all of my contacts that has that issue with my phone. I sent a text to my sister and she send me one back with no problem, then i send one from my wife's phone to my sister's and she replied again with no problem. Now i am able to send and receive text to my wife's phone with no problem and she is able to receive my texts but when she wants to reply to it, it becomes and MMS (because the header of my sms has my name and my phone # as an email: 1234567890@tmomail.com). Any idea what i or her might be doing wrong?. Her phone is a Motorola Cliq (android 1.5) with tmobile service. Thanks again por the help guys. Much appreciatted.