Making phonecall not properly send corressponding number?

While making phonecall corressponding number will not working…static number only sending properly

My code:

async callit():Promise
{
try
{
console.log(this.phoneNumber);
await this.Call.callNumber(“this.phoneNumber”, false);

}
catch(e){
     console.log(e);
}
}

Does any one have idea? working with making phone call?