N7100 4.4.2 IMEI NULL Done...[Reference]
Tools
Z3X Box
USB cable (5130c)
Root
Procedure:
1.Root using kingo root http://www.kingoapp.com/
(Note: If UNFORNATELY SUPERSU has stopped, Connect WIFI open playstore then update SUPERSU ,then install ...After install go to SUPERSU disable knoxx)
2.Open Z3x Box
3.Select N7100
4.Click Repair (Tick Reset EFS, Repair Network, Disable Test Mode, Input IMEI & SN)
5. Click Ok





Done
Tools
Z3X Box
USB cable (5130c)
Root
Procedure:
1.Root using kingo root http://www.kingoapp.com/
(Note: If UNFORNATELY SUPERSU has stopped, Connect WIFI open playstore then update SUPERSU ,then install ...After install go to SUPERSU disable knoxx)
2.Open Z3x Box
3.Select N7100
4.Click Repair (Tick Reset EFS, Repair Network, Disable Test Mode, Input IMEI & SN)
5. Click Ok





Done