Solutions to some common issues can be found on the Panasonic KX-TGA600M troubleshooting page.
Background and Identification
The Panasonic KX-TGA600M was first released in 2004. When fully charged, the phone can hold battery life up to 5 hours. It comes with a back-lit screen, headset support, and can be mounted on a wall. The phone's caller ID can recall up to 50 names and numbers. The phone is identifiable from many other Panasonic phones by its metallic finish.