[elpilluli]

Rescato este hilo para poner una solución que me ha funcionado con mi galaxy s4 con lollipop 5.0.1. Para los que como @makoki2006 y @Belcebu75 cuando llegan al menú NETWORK LOCK, sólo sale la opcion (1)PERSO SHA256 info (lo que me pasaba a mi). He seguido estos pasos (Créditos a DoctorNick de Disqus y a Bob Barker de android.gs):

1) Enter *#0011# on the keypad, this should show service mode with a bunch of statistics

2) Press the bottom left menu button.

3) When the menu pops up, select "back" (NOT the physical back key, the menu option)

4) repeat steps 2 and 3 two more times (for a total of three times)

5) Press the bottom left menu button, select "Key Input",

7) When the input field appears on the screen, select it and type "1", then hit the "OK" button

9) Press the bottom left menu button, select "Key Input"

10) Enter the captial letter "Q", then hit the "OK" button

11) Press the bottom left menu button, select "Key Input"

12) Enter "0000" (4 zeroes), then hit the "OK" button.

13) Wait for up to 20 seconds. The MAIN MENU should appear. (If the MAIN 
MENU does not appear by then, hit the "HOME" button and start over from 
1)

14) Select "[1] UTMS"

15) Select "[6] COMMON"

16 Select "[6] NV REBUILD"

17. Select "[4] Restore Back-up"

18. Your cell phone should restart. You should now have an unlocked phone!