What does iTunes backup and restore?

[stewart1988]

Im currently on 4.0.1 Jailbroken (iPhone 4) and want to update to 4.1 GM.

What will iTunes restore from the backup it makes? Are any jailbroken files/mods restored?

Reason I ask because everywhere always says they recommend starting a new phone and not restore from a backup.

I mostly want to restore my game saves as my Contacts are synced to my Google sync account. Im not worried about jailbreaking as I don't really use any of the apps/mods any more.

[Timtacious]

You can use AptBackup, AppBackup, PkgBackup, etc for jailbreak apps and app data, but they aren't backed up normally without those apps.