Why do my 3 phones have no signal and the main phone indicate 'in use
Our 3 phones have no signal. All on cradles but the main phone has 'in use' signal .
This was fixed by unplugging for a minute and thus 'rebooting'.
One of them is “off the hook”. Go to each one, try to turn it one then shut it off.
Happens to me a couple of times a month.