GPRS

Why does my blackberry only uses GPRS how can I make it use a faster internet? It is supposed to be unlimited internet but its slow only the GPRS. Shouldn’t it be faster than that? It can use my wifi but if I’m at home I prefer to use my laptop. How can I change it to use a fastter than GPRS?

i think if its a blackberry curve it only works gprs, for a phone to work quicker it has to be able to work on the 3g network and a few of the cheaper blackberrys dont