You’ve been playing Pokémon Go in the potrait orientation of your phone, Now with this Jugad you can play Pokémon Go in the landscape mode also.
STEP 1: Rotate your phone in Landscape orientation, Open Pokémon Go and Click on the Pokeball at the bottom of the screen.
STEP 2: Go to Settings in the Pokémon go app.
STEP 3: Click on Report high priority Bug.
STEP 4: Select Yes in the popup menu.
STEP 5: Wait for webpage to open and then Go to the home screen of your device.
STEP 6: Hold your phone in the landscape orientation and go back to the Pokémon Go app.
That’s it you got the Pokémon Go app in the landscape mode.