You can add a link to any text by selecting it in the text editor and entering a URL.
Steps
Open the text content component you want to edit. In the text editor, select the text you want to turn into a link.
Click the link icon in the toolbar.
Click the pencil icon to edit the link.
Enter the URL and click the checkmark to confirm.
Save.
Adding a phone number link
To make text tappable as a phone call link, enter the URL in the format tel:080xxxxxxxx when inserting the link.
The behavior of a tel: link when tapped or clicked depends on the visitor's device. On smartphones, the default phone app will open automatically. On desktop computers, it will only work if a calling application that supports tel: links — such as Skype or FaceTime — is installed. If no compatible app is available, nothing will happen.