You need not flash anything to get 5G working. An unlocked N976v works with TMobile 5G when Verizon unlocks the phone. But the device supports one of TMobile spectrum band which is 28GHz mmwave band, available only in few cities (this was the first 5G band used by Tmobile). Hence as of now, in order to get 5G working you need to be in one of those cities and stand few feet away from the antenna to get the 5G reception. You need not do anything, with default settings your signal icon change from 4G LTE to 5G automatically.I have the n976v and would like to flash it to the T-Mobile network to get 5G. Has anyone successfully done it?