I want to update to my Galaxy S4 R970C to cyanogenmod 12.1, but sense Cricket no longer supports this phone as they switched to GSM, there are no custom ROMS (that I can find at least) that support this device. Due to this, I am wondering if I could use the build for the Sprint Galaxy S4 L720 sense the CDMA Cricket R970C is pretty much a re-branded version of that, running on the Sprint network back when Cricket was CDMA. The only experience I have with installing custom ROMS on Android devices is installing Cyanogenmod 11 on multiple Sprint Galaxy S2s, so any help/advice is appreciated. BTW the phone is already rooted, that is pretty much the first thing I do when I get any phone lol.....