Default ATT internet setting for HTC Touch Cruise II

I am an ATT subscriber with six lines. I purchased an unlocked Touch Cruise II as a spare because of it micro SD storage and ability to play MP3 and MP4.

Everything works great. My daughters iPhone got wet so we had to use the HTC spare for her phone until the iPhone got fixed.

We slid her sim card into the HTC and everything work from the start, calls out, call in, WIFI Internet, text messages, etc.. EXCEPT we can not get it to hook into the Internet via the cellular network. I have tried a few things but nothing works because the browser setting for GPRS are blank.

I contacted ATT and was told because they do not sell this phone they cannot help me. I contacted HTC and was told they do not support unlocked phones.


Can anyone give me the step by step settings to get this phone to hook to ATT cellular Internet?


Thanks

CG