Hi (and welcome to the addiction...

).
To locate your firmware version go:
1) 'Options'>
2) 'About' (Third line down on the first page).
To confirm your device uses the correct unlimited BIS (not wap) go:
1) 'Options'>
2) 'Advanced Options'>
3) 'Browser'
4) Set 'Default browser configuration' and 'Default MDS browser configuration' to Internet browser.
5) save and Exit.
Let us know if there is anything else.
Kind Regards,
Greg Myers