unlock galaxy S4 L720T ndroid version ; 4.4.2 how to unlock this phone

hello
can you help for unlock galaxy s4 L720T
S4 sprint
SPH L720T BASeband L720PUBNG5
android version ; 4.4.2
THaNK Y

I did this from xda.. [q] ALL THINGS GALAXY S4 (GS4) MODEL SPH-L720T - Post #1406 - XDA Forums

first root , I dont know how to do 4.4.2 , I used towelroot for 4.3

you'll need to downgrade your modem to MK2 MK5modem(sph-l720t).zip - Solidfiles

get the ssu.apk( unlocker) from xda link. This will unlock internationally but not from U.S.

To unlock for U.S use you must go to service menu.

HOW TO GET TO SERVICE MODE MENU
(from kskh post 862)
*#0011#
Menu > Back
Menu > Input "Q"
Menu > Input "0000"
Wait for few seconds

UMTS -> DEBUG SCREEN -> PHONE CONTROL -> NETWORK CONTROL -> GCF
then select the first option. Galaxy Note 3 Neo N7505 new security Unlock Done! how to unlock this phone Tool v.18.1