| | Re: potential buyer, noob questions pls...
1. You must have THE BlackBerry Data Plan on your carrier account to use ANY data on a BlackBerry. BlackBerryMessenger uses data. The browser uses data. Facebook uses data. Most everything other than SMS and phone calls use data.
2. 8520, you mean. No, the 8520 can be upgrade to OS5 and no higher.
Yes, the 9300 is a better, newer device. It can take OS6
3. See #1.
5. Someone here from UK can comment.