Dear. I have bought S5 for LTE.
I ported out from ufone to zong
I got 4G LTE sim.
After that I did a research for about ten days.
I installed several different firmwares.
And at last I found what I just told you.
It is possible only with rooting the phone because there is LTE hardware in it.
You also find a single 900F with LTE option 8 network mode and please note down its firmware information.
That's our solution.
By the way if you install firm released for 900F for carrier released version. You will get it. But I am waiting for the international 900F firmware with this option.
Sent from my SM-G900F