Downgrade iPhone 4_3G_3Gs 5.0_4.3.5_4.3.3 to 4.0 (6.15.00) - iTunes Error (1015)

hie friends got the method to downgrading iphone from 5.0_4.3.5_4.3.3 to 4.0 (6.15.00)


view this video and get ready to do it on your iphone.