boostening

Boosting VOdaphone GPRS SPEED..?? HI..I have a VODAPHONE GPRS for my internet connection for my laptop...My GPRS average speed is a paltry 4 to 6 Kbps only..:(:( I have a Nokia 6681 which is an Edge enabled handset [ class 10] still its the same.. Please let me and other hundreds of Vodaphone...