Answer a second call (call waiting)
This page is for devices with calls and mobile data.
When a second call arrives you hear a short tone instead of the ringtone, and an incoming call strip appears over the call screen. Tap the answer button on the left of the strip. The first call is put on hold.
To decline the second call, tap the ignore button on the right of the strip.
Checked against the LuneOS code and installed apps. Nobody has tried these steps by hand yet, so tell us if something differs.