But the first thing they'd do even if you didn't jailbreak would be to restore your device and pull a backup from iCloud. If you want to keep your jailbreak, th

But the first thing they'd do even if you didn't jailbreak would be to restore your device and pull a backup from iCloud. If you want to keep your jailbreak, then they can't help you, because who knows if the latest version of iOS included a patch for your problem, a tweak you installed borked the phone, or if Apple borked it?