No Dial Tone

Ensure the power LED is green, and that the outlet supplying power to the AT&T Wireless Home Phone is not switched off.

Check that the signal strength LED is illuminated. If not, press and hold the Power button until it illuminates.

Ensure the phone you are trying to use is charged/under power, and is properly connected to the WHP Base Unit with an undamaged cable.

Relocate the WHP Base Unit to an area with better reception (usually near an exterior wall or window).