New iPhone 3GS user, question about restore
Just bough a used 3GS, it came jailbroken and unlocked with iOS 4.2.1 and baseband 6.15.00. The previous owner left his email and other details on there and I've slowly been cleaning them up.
However the phone has a missing AppStore icon. I tried turning restrictions off, and "Reset home screen layout" and it doesn't come back. At this point I would like to restore settings but do not want to lose the jailbreak or unlock.
1. is it safe to do "Reset all settings" on the phone? Will this delete the Cydia icon and other custom apps or affect the jb?
2. Is it safe to do a restore from iTunes using custom 4.2.1 firmware? Is this needed to restore phone to factory defaults, and will this preserve jb and unlock?
3. Short of #2 what else needs to be done to restore as much as possible?