How to restore iphone 3g without updating?
 

I hve the iphone 3g or 3gs i amnot sure. Thephone is disabled i need to enable.
Please guide me how.

1. Can i restore it without updating if yes how?
2.if i update it to the latest version the phone will need jail break?
3. What its easy way to jail break and unlock i phone without wifi?

Please help an guide me.

if it's 3G -> Use redsn0w_win_0.9.6xxx -> Boot it to PWNED DFU -> Shift + Restore in iTunes with Custom 4.2.1 ipsw -> all be fine.
if it's 3Gs -> use redsn0w_win_0.9.6xxx -> boot to PWNED DFU -> Shift + Restore in iTunes with custom 4.1 ipsw -> all must be fine again