This apk app will unlock your phone in seconds. Its been tested to work on all Samsung sprint phones such as Note3,Note4, S5, etc…
Just install the program and click unlock. Keep in mind that this will not work for USA carriers. All 4.4.2 and up modems has a hard lock on those sim cards. So you can unlock phones older than the S5 to work in the USA, you just have to downgrade the modem.
How to Use
Download Sprint Samsung Unlocker
Unzip it and install the ssu.apk After that click unlock