Step 1) Download iOS 6.1 firmware for iPhone/iPad/iPod Touch from the post.

Step 2) Install New iTunes 11 and open iTunes 11 and connect your iDevice via USB cable

Step 3) Select your device from the left navigation panel on iTunes 11

Step 4) Hold down the Shift (Windows) or Alt/Option (Mac) key and hit the restore button on iTunes

Step 5) Browse and select the downloaded iOS 6.1 IPSW file. Let the restore process complete.

Download iOS 6.1 LINKS:

iOS 6.1 iPhone 5 (GSM, CDMA)

iOS 6.1 iPhone 4S

iOS 6.1 iPhone 4 (GSM, CDMA)

iOS 6.1 iPhone 3GS

iOS 6.1 iPad mini (GSM, CDMA, Wi-Fi)

iOS 6.1 iPad 4 (GSM, CDMA, Wi-Fi)

iOS 6.1 iPad 3 (GSM, CDMA, Wi-Fi)

iOS 6.1 iPad 2 (GSM, CDMA, Wi-Fi, WiFi New)

iOS 6.1 iPod touch 4G
iOS 6.1 iPod touch 5G