Hidden Menu Won’t Show SM-G920P

Okay, so I’ve domestic unlocked and unlocked the SM-G920P *Sprint Galaxy S6*… To complete the unlock, I’m well aware I must open the Hidden MENU via *#0011#… The only issue is, the menu must be disabled somehow, because it fails to open.. How can I get to this menu, or alter these settings without the menu, or maybe even unlock the menu? I’m unsure as to what ADB is and how I can reach the menu that way. Someone please give me a detailed description as to how I can configure the settings without being able to get to the menu? PLEASE HELP ASAP.