Yes, you can. In order to send SMS messages to non-ICQ users you need to add the user to your Contact List.
Follow these steps:
- Click Menu and select Contacts > Add contact .
- In the Add Contact window, from the Select contact type list, select Phone contact .

- Enter your Nick friend's name and Cellular phone number and click Add.
You can find the new contact under the Phone Contacts group.
- You can now double click the phone icon in the Contact List to send the SMS message.