This tutorial shows how to convert G930P and G935P with bootloader Revision 5 and 6 to the G930U and G935U firmware, respectively, via flashfire. Knox will not be tripped.
A method to root and install TWRP recovery on the Virgin/Boost Samsung Galaxy J7 SM-J700P is here. Android fanatics keeping their eyes on the methods to unleash the true power of their J7 are now free to do it.
Some Sprint Samsung phones require additional configurations be done after unlocking to make them receive signal on the new carrier. If your phone does not show signal after unlocking it, then read the following guide.