I have a G920F at the minute which suffers from poor reception. Now a new modem OF8 have been released for the G920I that improves the poor signal issue. Upon checking out the 2 phones the G920I modem has all the bands that I need even though I have a G920F. LTE 1800/2300, 3g 2100, 2g 900/1800. So Im wondering is it safe to flash the G920I modem.