Below are the steps to use your phone again with the FYSIC layout when it is in the Android layout.

If you are using the Android layout, tap the white circle with the 6 dots at the bottom of the home screen.

Then scroll down until you see Settings, tap it, scroll down until you see Apps, tap it.

Then scroll down until you see Settings, tap it. Then scroll down again until you see Home Screen app, tap it. 

Then tap home screen app again, you will now see two options, Google (this is the default Android layout) and Fysic simple phone, tap on these. If you now tap the curved arrow key at the bottom right of the phone several times, you will return to the home screen. 

Press and hold the power button on the side and tap "Restart" or turn off the phone completely and restart it, now you have the Fysic display and layout back. 

If you want to switch from the Fysic to the Android layout:

When the phone is on, swipe to the second screen and tap Settings

then Advanced Settings and scroll down until you see Settings and tap it. 

Then scroll down again until you see the Home Screen app and tap it. Then tap Home Screen app again.

You will now see two options, Google (this is the default Android layout) and Fysic simple phone, tap on these. 

If you now tap the curved arrow key at the bottom right of the phone several times, you will return to the home screen. Press and hold the power button on the side for a moment, then tap Restart or turn off the phone completely and restart it. 

Now you have the Android display and layout and can move and rearrange the APPs as you like.