How can I downgrade my iPhone 4 back to IOS 5.1.1? IOS 6 isn't working for me.

Question

I've been having wifi problems and I heard it could be fixed by downgrading. Now I just need to figure out how to do that.

Answer 1

Here is the straight answer, and you are not going to like it:
There is buzz all over the internet about how to revert back to iOS 5.1.1 after upgrading to iOS6.  Many of the 'experts' on this site simply tell you 'no, it is unsupported' but don't say why.  My best guess is they simply don't know, and are spouting 'applespeak'  Here is why:
Although iOS 5.1.1 firmware is freely available for download, and there are various 'jailbreak' programs that will allow you to attempt a downgrade, there is one critical part missing - the individual digital signature for your device, and your device alone - the SHSH blob.  This is what allows the firmware to load.  It can't be downloaded.  It can't be copied from another device.  It must be saved before you upgrade, something most people that are asking the downgrade question have not done - and never thought to do.  Once you have upgraded to iOS6, the SHSH blob for iOS 5.1.1 is gone, and you are stuck, until the applemeisters decide to issue the next iteration of the OS, which may or may not fix your individual issue(s).
My advice to everyone that reads this is to email Tim Cook (tcookatappledotcom), and let him know how you feel.  I did.  I have been a fan of Apple since the iPod Mini, and now find myself cooling toward this brilliant, but flawed company.