I believe the 111 code is for canadian networks. For Tmobile, use *noti# at the beginning of the sms.
I send to multiple people on different networks. when the SMS is delivered to the persons handset, regardless wether cingular or AWE in my observance, it will say delievered. Or if it isnt delivered, then it will send me a message saying "message buffered" and will send me another message telling me that the message was delivered or if it failed.
Courage is being scared to death...
And saddling up anyway.