I have an Iphon6 Jailbroken, Long story short made a mistake and lts now stuck in the Apple Logo. I have experience with restoring but I have a simple question. How do I restore the phone back to 8.1.2? It was already on 8.1.2. Never been to 8.1.3. And what version of ITunes should I use, or am I SOL? Thank you guys for your time!