To connect internet at first u have to contact ur gprs service provider to know your APN.
then u have to go start-control panel-phone and modem option...then select modem-properties-advanced and hear u found extra initialization commands and u have to type AT+CGDCONT=1,"IP","your APN",<cr> after typing press ok.
All wrong lol. When you built or customized your laptop you had the option to get mobile broadband from AT&T, SPRINT, or Verizon. THe sim card slot is to be able to use the services like on a phone with AT&T. Your phone wont work until the simcard is in the phone. Same thing with the laptop. Just the only thing is you dont have the "Phone" you just have the sim card slot. YOu get it, you are missing the componet to be able to use the service. The sim card slot is just a stard thing to be there. It has no use unless you have that componet. I've heard that you can get contacts off it but I have not had luck with that. Hope this helps