How do I set up Philips DECT 215 To Show number calling

Remove all handset batteries and leave for 10 minutes.
Unplug main cradle and reconnect after 30 Seconds.
Replace all handset batteries and place handsets back on cradles.

To hear the volume of caller whom u called or they called ... call 2 any number and press up arrow in your device......the volume will be increased....COOL....

My manual for the dect 6.0 does not show a call forward section but our provider (frontier) says we have the cability. I am thinking the dect 6.0 phone itself does
not have the feature. We need a different phone.

press the button with the orange cassette on it, this will display some numbers and make a noise. then press number two(orange play) button.

During a call, press the top right button to turn mute off

Manual

sounds simple in the manufacture hand book that came with head set
states on some models they have this particular compatible mode built in
depending on specs of phone and headset gotta make sure that they were built with these built in specs and not all dect/gap work with other sets

Geting you the manual.

http://www.p4c.philips.com/cgi-bin/dcbint/cpindex.pl?scy=GB&slg=ENG&cat=CORDLESS_PHONES_CA&sct=DIGITAL_CORDLESS_PHONES_SU&session=20090114021325_90.215.10.17&grp=PHONES_GR&ctn=DECT2153S/07&mid=Link_UserManuals&hlt=Link_UserManuals

It's a while since you posted, but find your exact model number (under the basestation) then go to:

http://www.support.philips.com/support/html/index_gb_en.html#../~scripts/xsltransformsearch.asp?url=http://www.sms.philips.com/catalogue/list?sid=SMS||type=CONSUMER||locale=gb_en||mode=prod_text||item=dect%20122||page=1||show=50&xsl=search_result.xsl

You'll find the English PDF file from the list!