How to clear a full mailbox on the 6.0?

Here is Uniden's online link: http://www.uniden.com/index/home.cfm
Mid page you'll find a spot to look for the owner's manual to your phone.
In the event the book fails to offer any help or "how to" instructions to remedy your problem, and you are still unable to clear your mailbox entries, contact your cell phone provider for tech support. The problem may be on their end.

Making Use of the Voice Mail Service
From your own extension
VPS* Extension No.
Mailbox
· If you have no password, you can skip the last step.
* VPS: Voice Processing System
From someone else's extension
VPS Extension No.
Mailbox No.
Mailbox Password*1 +
· If you have no password, you can skip the last step.
Listening to a Message
Password*1
+
KX-TVA series
Listen to Message
Deliver Message
Mailbox Management
Automated Attendant
Message Notification
Other Features
End Call
KX-TVS series
Listen to Message
Deliver Message
Check Mailbox Distribution
Automated Attendant
Mailbox Management
Other Features
End Call
VPS Extension No.
Leaving a Message
From your own extension
Mailbox Password*1 +
From someone else's extension
Mailbox No.
Mailbox Password*1 +
· If you have no password, you can skip the last step.
Enter the desired mailbox no.
To send the message immediately
Leave a message
(KX-TVA series)
(KX-TVS series)
Follow the guidance
To set the delivery time

The introduction message is usually setup as a custom service menu. You need to determine if this is the case by logging into the message managers mailbox and listening to find the current greeting. To log into the message manager mailbox, call voicemail, dial #6 then *98(for 2 digit mailboxes) or *998(for 3 digit mailboxes) or *9998(for 4 digit mailboxes), enter password followed by #. Once in the message managers mailbox, press 5 to record messages. Your introduction message could be the company greeting or a custom service menu. Press 1 for the company greeting and follow the prompts to listen to the greeting. Press 3 for the custom service menu, then enter the custom service number 1-100( in your case start with 1 until you find the current introduction message) and follow the prompts to listen to the message. Once you have found the current introduction message record your new message and save.

intercom 777 *, *, 0, #, 12345678, # press 9 to admin, listen for mailbox administration, press appropriate number, then listen press, listen but it should be mailbox number thn 6 to reset !!!!! it deletes all messages. then reapeat for all extensions. listen to prompts after reset they should be all set to 12345678 #

You have to dial 1 to get in your mail box. Follow prompts to listen to your messages. If you never activated your voicemail your password is most likely the last 4 digits of your cell phone number. Delete messages and your mail box will be able to take new voice mail. Worse case scenario, go to your nearest store and ask a representative to reset your password to clear the messages.

http://www.home-electronics.net/ge/pc/user-manuals.asp
Try this site.... personally, I could not find your exact model number. Hope this helps somehow.

mt mailbox is full

access system manager mailbox
listen for change a mailbox
enter mailbox #
It will ask if you want to delete security code
you need to know manager mailbox number and password though.
ldtsnj.com

It sounds like your mailbox is full. Maybe your mailbox is set to not allow enough messages or enough time. If you simply have too many messages that are hang-ups or the like and you would simply like to start over, the easiest thing to do is delete the mailbox and create a new one.

We have a support package that allows us to make all the changes you need over the Internet for a flat annual fee. If you want your whole system to work properly and all changes to be made for you at a flat budget, call us at 877-236-8376.

Moving a Message to Another Mailbox

You can move a message from one mailbox to another. The message is saved a a new message in the mailbox to which it's been added and is deleted from the original mailbox.

1 While the message you want to move is playing press "setup". The system beeps and stops playback, the Message Window displays CP (for copy) and the Mailbox lights flash.

2 Press the MBox button where you want to move the message. The system resumes playing messages in the original mailbox.