I downloaded this N7100XXUFNI4 and now my phone works halfway. I already have IMEI, 004900xxxx. I am now in 4.4.2 but based on my search here, I need to have a 4.2 so I can reflash my old modem with GT-N7100_XXDME4_Modem as it says it will restore my IMEI #. Question is where I can get a downgrade of N7100XXUFNI4 to 4.2? I already downloaded N7100XX**** 4.2 in HongKong but the ODIN Mode says, "SW REV. Invalid magic string."