Need Help me.. N7100 imei null/null and baseband unknown

Hello guys...I want to imri back and baseband i try it efs restore but notworking again 4.1.1 and 4.1.2 downgrade try it not working how can do it ...help me....:(:(:(:(:(

via Welcome to gsm-tips http://forum.gsmhosting.com/vbb/f777/need-help-me-n7100-imei-null-null-baseband-unknown-1741428/