Default [Q] LTE band 7 on ls980?

Hi, guys.
I have ls980 on stock ZVA, rooted and GSM unlocked. 3g works fine, but there is no LTE. I live in Russia, and our LTE bands are 7,20,38.
So, is there any way to enable other LTE bands than Sprint's 25,26,41? To flash proper radio or baseband may be?
Thanks!