How to restore iPhone 5 to iOS 6.0.1?

I have a jailbroken iPhone 5 on iOS 6.0.1. Recently when i use the phone, I can hear the other caller fine but all i here is static. I need to restore my iPhone to 6.0.1 I won't restore to 6.1.4 because i'm not willing to give up the jailbreak. I have never updated to anything higher than 6.0.1. I really need your help!

Sorry, but a method to do that hasn't been developed yet - even last year's 4S can't be restored to a lower version of iOS!

I'm not quite sure what you mean by the static sound issue you're describing, but the issue would either be in software or hardware - most likely software. Since you're jailbroken, try going into Safe Mode and checking if the problem persists then. If it doesn't, the problem is being caused most likely by a tweak you have installed - use SBSettings to disable tweaks one at a time, and then check again after each.

If that's not the case though, and it persists, your problem may be in hardware. In that scenario, it'll be either your microphone or the upper speaker that isn't functioning correctly, so I'd recommend taking it to a repair specialist - and not Apple if you want that jailbreak! If you're in the UK, MendMyi or corePhone are both really good specialists, otherwise have a look around online for your local area.