Yes. Open the flip top. Use UP/DOWN arrow keys to select "Phone Book". Press UP ARROW. Select ADD. Press YES. When you see the prompt "Enter Name" enter the name on the 0-9 keys where you press 2 once for A, twice for B, three times for C, etc. Then it will ask you to enter the phone number. The prompts are all about UP/Down arrows or YES/NO buttons. Very easy.
The next time you open the flip, use arrows to scroll to Phone Book and then scroll to the name.