Some Bluetooth functions work like file transfer, Bluetooth speaker etc.. The only thing not working is the Bluetooth headset; Also TWRP is only required for new ROMS like KitKat and Jellybean,to install older Roms with TWRP you need to change a file somewhere, (I really can't remember right now I'll post back on where I heard that from) ; I didn't like CWMR that much to begin with because the backups it made sometimes failed to restore as well .
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Sent from my SGH-I927 using Tapatalk