[Not Pinephone] Phosh Autologin

[rocket2nfinity]

Thanks.
The main problem I have now is the absence of a generic "back" button somewhere; would you per chance know if there is a way to set one ?
Also, is there a way to calibrate the touchscreen (and/or to check if it's in good physical condition) ? The "swipe up" action to close applications is working randomly, sometimes it takes 10 attempts to succeed.
On windows there seem to be an option to calibrate it, but I don't find anything about it on Phosh or Debian.

xlibinput_calibrator in an X session or weston calibrate with weston tools