ICQ for Nokia Communicator

Yes, you can.
If you want to add a Non-ICQ user, follow these steps:

1. Click on the Menu key and select the Main option.
   
   
2. Choose the Add Non-ICQ user option.
   
   
3. Enter a Display Name and a Cellular (SMS) Number.
   
   
4. Click on the Done button to add the user to your Contact List.

Note: If you want to leave the search form without completing the search process, you can simply click on the Esc button.