Download ICQ for iPhone

Once logged in to ICQ Messenger, another dialogue window will appear prompting you to add your telephone number to your profile. By adding your number, you will be able to sync all of your contacts to the app.

If your contacts do not have the ICQ app on their device, you will be able to invite others and start chatting. Be prepared for a SMS text message from ICQ Messenger asking for confirmation that your phone number is valid. A code will be sent to you to verify your number within the app.