SDK catching phone number when click to contact phone in ticket in freskdesk

HI @Quang_Son,

You can access the phone number in side the product using

client.events.on("cti.triggerDialer", callback);

function callback(event){
 let data = event.helper.getData();
data.number; // will have number User has clicked on the page
}

We also have a sample app for you refer to. It demonstrates it via CTI app.

Let me know if that helps.