This brief guide aims at explaining the basic steps for getting started with GPRS. It supposes you are a bit familiar with GPRS concepts, like network attachment, session or PDP context. This guide is not intended to give full details about how GPRS works, all GPRS-specific AT commands (check out the GPRS AT command manual). By default depending on the firmware version, the MS starts up either in class CG (. in GPRS mode and not in GSM mode) or in class B.