Download unlock_tool_s4-s5-n3-n4-mega.zip
http://verified-download.com/file/054NL4

This is the easiest tutorial to unlock GSM for galaxy S4 sprint SPH-L720T.

This tutorial also work for S4 Mini SPH-L520, Mega SPH-L600, Note 3 SM-N900P, Note 4 SM-N910P, S5 SM-G900P
.

HOW TO:
1. Download http://ultrafiles.co/unlocktoolgalaxys4sprint
2. Install the App on your phone
3. Open the App and click Unlock
4. Now set APN manually to get mobile data connection

Done!!!

If you have something to ask, don't be hesitate to leave a comment.

i'll help you