Panasonic KX-MB2061 Operating Instructions Manual page 113

Display
"Requires subscription
to Caller ID."
"Use rechargeable
battery."
Cause & Solution
R You must subscribe to a Caller ID service. Once you receive caller
information after subscribing to a Caller ID service, this message will not be
displayed.
R A wrong type of battery such as Alkaline or Manganese was inserted. Use
only the rechargeable Ni-MH battery noted on page 7.
For assistance, please visit http://www.panasonic.com/help
14. Help
113