Hi,

Check to see if your Caller ID service is working.

Using a mobile phone, call the Dect 6.0 phone number and see if the Caller ID information is displayed. Allow the phone to ring and see if a number appears in the Dect handset display window. You do not have to answer it.

If the number appears then disappears, according to the user guide You may have to change the line mode. Contact Customer Service for instructions

Here is also a link to the Caller ID troubleshooting guide from Uniden.

http://unidensupport.com/callerid

If no number appears, after all your checks, as Caller ID is a subscription based service provided by the phone company, get the phone's account holder to contact the phone company to verify that the service is still being provided to the phone.