Hi @a440
Unfortunately there a lot of different Uniden DECT 6.0 models and they don’t all have to same user operating menus.
DECT 6.0 is just the signalling protocol that is used by the phone handset and base station to communicate between the phone and its base station - i.e. '''D'''igital '''E'''nhanced '''C'''ordless '''T'''elecommunications Version '''6.0'''
The actual model number should be shown on the phone somewhere, perhaps in the battery compartment or even in/under the charging cradle.
If you get what as known as "stutter" dial tone when you go to make a call it means that there is a call in your Voicemail mailbox and maybe that is why the message indicator is on. Have you checked that there are no messages in your Voicemail mailbox?
If you don’t have a Voicemail service with your phone service, then perhaps it has been switched on accidentally by the service provider. I had this happen to my service when the service provider upgraded the equipment that my service was connected to. It automatically turned on the voicemail service to everyone affected by the upgrade, whether they had the feature or not before. I had to contact them to turn it off on my service as I don’t use it so as to get rid of the indicator.