PDP is Packet Data protocol. When you want to use GPRS, your mobile will first attach to a GPRS enabled network in the country you are
roaming and then your mobile will automatically activate a “PDP context”. PDP context is essential for the visited network to authenticate you
as a valid GPRS user. Some operators may charge for PDP context. We recommend that you switch off GPRS after you have finished to avoid
any additional charges.