Fant litt bedre forklaringer under guiden.
Dette fungerte fint og jeg trengte ikke gjennoprette som ny.
Endelig en brukenes iPhone 4S
STEP 5: You’ll now need to execute CLI. Do this by typing: cinject.exe -i payloads/jailbreak.mobileconfig. Tap the install button that appears on your iPhone, there is no password for the VPN so just hit next.
STEP 6: Now execute cinject.exe -j payloads and wait for the backup. (If you get the FATAL(_LINE_) error, go to Settings > General > Reset > Erase All Content And Settings. When you're iPhone restarts, start as a new iPhone and repeat steps 1-6.)
STEP 7: Execute the command cinject.exe -w. After the first wave of text goes through on the command prompt, on your iPhone, go to Settings - General - Network - VPN and turn the VPN toggle from off to on, after a few moments there will be an error message and the phone will restart, when it starts again, you'll find cydia on the second page of apps."