Apple Icloud lock Bypass
On the iPad 2 3G Model A1396 (GSM) remove the resistor r1205. On the Model iPad 2 3G A1397 (CDMA) move resistor r1205 to position r1204.
iPad 2 3G will enter DFU mode.
Connect the iPad 2 3G to your PC or Mac.
After that you need to restore the iPad 2 3G through iTunes with firmware of Wi-Fi model and activate using the official method.
Turn off the automatic firmware update: Settings \ iTunes Store, App Store \ Automatic download \ Updates.