Troubleshooting
Many common issues can be solved by using the information found here: Sony ERICSSON KH668 Troubleshooting.
Background and Identification
The Sony ERICSSON KH668 cordless phone was released in 1999. It is a heavy, rectangular black phone of a classic design, with a long antenna. The ERICSSON logo is printed in white lettering above the display screen, and the model name can be found in the lower right corner. This device also uses a cell phone charger and is compatible with a range of accessories. It is equipped with the ability to hold calls, tell time and set an alarm. However, there is no built-in memory, QWERTY board, or camera.
Additional Information
Sony ERICSSON KH668 in Phone Database
How to Replace Cordless Phone Battery
Step-by-Step with pictures: How to Upgrade Cordless Phone Battery