Mine sure can not. I have an S9 with HPUE and it absolutely can not use -128. Also, I suspect that when we use carrier aggregation on 2500, HPUE is disabled. I doubt if the cell phone can transmit at the high levels of HPUE on two channels.
Somebody please verify that I am right or wrong on using HPUE on 2 aggregated channels.
I don't recall if I mentioned it here but major updates like those above features are usually sent out each quarter so it's not ready as I last checked a few weeks and they don't expect it til at least fall at the earliest. They've been doing field tests on the alternative backhaul mode but it requires network configurations and hw deployments out of the hands of the MB team. Sent from my Pixel 3 using Tapatalk