Help behold 2 unlocked, nedd internet help. if possible

[mocrawlin]

i got the behold in a trade, got the unlock code thru previous owner and now have my sim card out of my straight talk cell in it. i can make calls and text, but wont go to internet. i am gonna do some searching here for how to figure out where i go to change the connection source, to att(who is straighttalks provider) but i thought i would get some up to date help if anyone has tried the straight talk network with these. i have unlimited everything, so i would like to get it working, the s.t. phones r not the best for internet, and non are touchscreens! so any help would be greatly appreciated. now im gonna look around here for info. oh yeah, the phone is running 1.6 system also.