Carrier-locking is a dirty trick. Customers see it as being held hostage by the network even after they’ve paid handsomely for the handset.
Samsung’s Galaxy S5 is no different – it costs a lot, is a great phone, aaaand – there’s no unlock code to free it from its network shackles. Until recently, that is. A company insider has revealed an unlock code for the Galaxy S5.
If unlocking your GS5 appeals to you, then read these directions carefully before using the code and enjoying a bit of freedom.
One. Insert a foreign SIM card into your Galaxy S5.
Two. Turn your GS5 off and then back on again.
Three. On the dialpad, enter in *#197328640#.
Four. Select  UMTS >  Debug Screen >  Phone Control >  Network Lock > Options  Perso SHA256 OFF.
Five. Wait for 30 seconds before going back to your main menu by selecting back.
Six. In your main menu, you should see “Network Lock” displayed, so choose  NW Lock NV Data INITIALLIZ.
If all’s gone well, your Galaxy S5 should be unlocked now. If you need to make sure, try out a SIM card from another carrier. Other Samsung handsets work with this code, so do give it a go and tell your friends.