SIM unlock your Samsung Galaxy S6 or Galaxy S6 edge. 1  Remove the SIM tray on the side of the phone with the SIM tool. 2  Replace the SIM card with one from another service provider. 3  When prompted, enter the SIM unlock code you received from your service provider.hile the Samsung Galaxy S6 and Samsung Galaxy S6 edge can be purchased with unlocked SIM slots, anyone who has purchased either of the phones most likely bought a locked phone from a service provider.