Can I add/block/delete a contact?
Yes you can.
To add a contact, after you log in to ICQ for mobile click “Options” –> “Add” -> “ICQ contact”
In the window opened there’s a search box where you enter your contact’s name or ICQ ID, when the contact appears in the search results you can add him to your list.
To delete/block a user have the cursor point to that contact in your contact list and click “Options” –> “Contact”
A sub menu opens that allows you to delete or block a contact, as well as see your chatting history with that contact, see the contact’s profile or start chatting with him.