I want to upgrade teh ROM on my O2 to a generic version but.

[azmerlin]

I got the phone from a guy on EBay and though it is unlocked to all networks and works with my Orange SIM, how do I know if it is CID unlocked ? :?

[SophisTicationS]

you will not know if it is CID unlocked.

your best bet is to CID unlock it anyway.

it wont harm the phone to CID unlock more than once.

[DavidT.]

If you just want a generic ROM and are happy with the one you're running right now (Minus the o2 junk) just hard reset your device and then when it gets to the "wait three seconds" part, soft reset right when it gets to that screen. It will prevent WM5 from installing all of O2s crap on there and you have basically a clean slate version of what ROM you're running.