HELP PLEASE !!! How to Downgrade iOS 5.1.1 to 4.x my iphone 3g

[tafzarti]

hello all membres and think you all admin ..
my problem How to Downgrade iOS 5.1.1 to 4.x?? Because my iphone 3g became very slow

 

[willerz2]

The 3G caps at iOS 4.2.1. If it really is a 3G and not a 3GS, there's a reason whited00r shouldn't be used. The only way to get rid of it is to DFU restore it through iTunes