Few weeks ago, Apple has released iOS 6 IPSW firmware for devlopers on it's official site. Amazing guys over iFans forum have released an amazing method to download iOS 6 on your iPhone, iPod touch and iPad without registration as developer user and without activating your idevice's UDID. So if you don't have developer account, you can upgrade your idevice to iOS 6 with the following step by step guide. Let's try it after the jump.
How To Upgrade To iOS 6 Without Developer Account :
Step 1: First of all you are going to need to download the iOS 6 Beta 2 firmware. It would be best if you have a friend who is a registered developer but even if you don’t then finding the firmware will not be much of a problem, all we can tell you that it’s out there.
Step 2: Next, you will need to downgrade or restore you device to the old iOS 5.1.1 firmware. The reason you will need to restore is that a lot less errors occur when you have a stock iOS.
Step 3: You will also need the latest version of iTunes available from here: (that’s one download we can tell you about). It the new version 10.6.3 and you need this for the upgrade.
Step 4: Now, once the latest version of iTunes is installed, all you will have to do is connect your device with iTunes, and press shift + update Windows or Option + update Mac and select the firmware file in this case the iOS 6 beta 2. Keep your fingers crossed and wait for it to finish.
Congratulations You Are Done