This is for the model with buttons as on the picture below: If it is not exactly like this

Charge for 16hrs before use.

Hold POWER button to turn phone on or off.  Press and release to turn keypad lock On or Off.

Phonebook:  Adding a name and number;

Press MENU, press down key till "phonebook" is shown, Press MENU, Press Down key till "New entry"

 is shown, Press MENU, Enter the name using the keypad, Press MENU, Enter the phone number, MENU.

Dialling from Phonebook: Press PHONEBOOK button, use up / down key to select then GREEN

Earpiece Volume:  During a call use Up / Down to alter. If it is too loud it may echo

Registering a Handset

Hold down base page button for 30 seconds. (It will beep)

Press Menu and scroll down to "Registration", Menu, "base 1"..., Menu, "searching",  Enter Pin 1590, Menu.