Accessing the 1.6 Stardew Valley experimental mobile multiplayer involves entering a cheat code of sorts.
Eric “Concerned Ape” Barone announced that it is possible for mobile Stardew Valley players to try out experimental multiplayer if they updated to the 1.6 version of the game.
As a reminder, the 1.6 series of updates for Stardew Valley increased the multiplayer cap on platforms that support it.
Stardew Valley is available for the Nintendo Switch, PS4, Xbox One, PCs, mobile devices, and the PlayStation Vita.