I'm new to the Blackberry - just bought a 2ndhand one, a 7230 running software v. 3.7.0.77 (platform 1.6.0.116) according to "About".

The phone is unlocked, and I have an O2 sim card in it.

Sould I upgrade to latest software versions as they become available (i.e. to V 4.0) or stick where I am? If not V 4.0 then which is the best version for the 7230?

I don't use the email functionality yet, just the phone/pda functions.

many thanks