Our Uverse phone rings randomly a few times a day. Happens anytime but more frequent in the wee hours. Just a little half-ring, not long enough to get caller ID, and no caller on the line when we answer. Seemed more frequent around the election, but has been going on for months, and still continues. AT&T tech said maybe a test signal? So they allegedly disabled tests for us and we still get the rings.
Any idea what could cause or how to stop it?