With the phone off (no dial tone), press 'Mem' and the # you want to store a phone # to, eg, 'Mem 1'. Press 'Mem' again, then key in the telephone number you want to store. When finished, press 'Mem' one more time, and you should hear a longer than normal 'beep'. You're done. (I'm not sure, but I think this model will only store 10 numbers, in Mem 0 thru Mem 9.)
Ron, March 2008