Red light flashing

first press power button for 10 seconds.
then remopove battery for 5 seconds from it then refix battery .
then again give power then if still facing problems then reset all settings to factory defaults.
Go to mennu and find reset menu then reset settigns.

If you do not have voicemail than it is an option. If you want to reset the phone, disconnect battery for at least 24 hours. This should fix the problem. If problem does by chance persist, than the problem is most likely an electronical problem that will have to be repaired by an experienced electronics technician

the default pin is 0000. Try it.

The default pin for the answering machine is 0000 , you get the message because the answering machine had been active for some time and recorded few message.

If PIN 0000 does not work, thatt means that a new pint had been entered, in that case contact Philips at the phone number listed on the owner manual to get PIN unlocked.

To fix the problems listen to messages and chose to delete.

Here also the user manual: user manual for CD4452B-37

See also CD445 www.philips.com/support EN Digital Cordless Telephone .

Hi,

Try changing over from Line 1 to Line 2 it has worked most of teh times in the past.

Else take up the manual & reset the phone to factory settings (only way out)

Thanks

Fame !