CraftableGamemodeChanger

This mod adds Craftable Gamemode Changer, to see recipes download "JEI" mod or see guide on youtube (if it has youtube).

With this Phone you can change your difficult to Survival or Creative or Adventure or Spectator Mode in 1.12.2, but you can craft it.

! If you  haven't got OP on multiplayer or cheats on single player and turn on spectator you may not bring back yourself to other mode.