I saw a prepaid sim where the debit interval for gprs is in increments of 50kb? Will i then get billed for 100kb if I only use 75kb? If I keep the gprs connection, alive, can I then use 50kb during longer times, eg if i have a push email which uses 10kb each hour, will the gprs allow me to keep the connection alive and thus pay for 50kb and not get the connection reset after a while and have to pay for 50kb even I haven't used up everything?

Thanks.

Yes, you will get billed 50k if you use 1 and close the connection.
You can keep the sessions open as long as you want - some cards close the sessions automatically every 12 or 24hours though.

Keep in mind that if you are moving around with your phone it can happen from time to time that the session cuts off cause of weak network or handover from some cells.



Chris