How do I use Calling card with my Dect 6 phone

go google and type in --user manual for uniden dect 1580-6 dect 6.0 --and there plenty of sites with pdf version down loads
print one out and follow the directions

Since you didn't give the model of your Uniden DECT 6.0 phone, please select it from the list beginning at http://www.uniden.com/bin/venda?ex=co_disp-view&bsref=uniden&scat=dectphones_mnl to download a copy of the manual.

Since you didn't specify the model of your Uniden DECT 6.0 phone I can only suggest you select it from the list beginning here to download a copy of the manual.

The same as with any other phone. 3-way calling is a feature provided by your telephone company, and the procedure varies from company to company. Please contact your telephone company for instructions.

Try calling your home phone. when the message starts to play press the # or * key. It should ask you for your voicemail password.

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Since you didn't specify the model of your phone I can't give you a definite answer, but on many Uniden DECT 6.0 systems the ringer tone (and volume) is controlled on the main menu.

Select the model of your phone from the list beginning at
http://www.uniden.com/owners-manuals/dect-phones/scat/dectphones_mnl/
to download the manual.

cannot see the caller id working or it doesn't display the number of who is calling. bought these phones a month and half ago.

Here's a link, scroll down to 'download now' and you can download to your pc. If this helps you plz rate this fixa. Thank you kindly.

http://www.generalmanual.com/Telephones/Uniden-DECT1560-3-DECT-6-0-Cordless-Phones.htm

You can try to set fowarding function off in your dect phone..