I had this smartphone working just a few days ago (on CM12.1) but because I changed the phone number on it I had to flash it back to the stock firmware to run the PRL & Profile update. Now that I've flashed CM12.1 back on it the only thing not working is the phone/mobile data. I read on the XDE website that I need to flash a NH7 modem, but the only link on that page is dead.... I believe I flashed the modem the last time I rooted the phone and installed CM12 but that's been over a year ago and I didn't keep a copy of it on my PC. I briefly looked around on google but haven't been able to find any viable solution. Any help would be much appreciated. Thanks in advance!