After samsung blocked the hidden service menu unlock for s4 i am bit worried .but today i found out new process to unlock for free in a website

Step 1: Launch the Phone app on your Galaxy S4, and dial in: *#0011#

Step 2: Press the Menu button followed by the Back key. Then, hit the Menu button again and select KEY INPUT. Enter 1 and press the OK button to enter ServiceMode.



Step 3: Press Menu one more time and tap back again. This will pull up the Main Menu for ServiceMode. Tap [1] UMTS.



Step 4: Now select [1]DEBUG SCREEN, followed by [6] PHONE CONTROL.



Step 5: From the next screen, pick [6] NETWORK LOCK.



Step 6: You’ll get three options. Hit the one that says [3] PERSO SHA256 OFF.



Step 7: Now, you need to get back to Main Menu. To do this, hit the Menu button followed by the Back key. In Main Menu, now pick [6]COMMON, and then [6] NV REBUILD.



Step 8: The phone will tell you that a Golden Backup exists. Tap [4] Restore Back-up.