How do i dial ussd code using ionic 4 Call number plugin

Ionic Native
1

i am getting error during runtime when am trying employ this plugin to dial a ussd code. my code
CallNow(passedNumber){

this.callNumber.callNumber(passedNumber, true)
  .then((data) => {
    console.log('Launched dialer!'+ data);
  })
  .catch(() => console.log('Error launching dialer'));

}
somefnc()
{
if(index==1)
this.CallNow(’*125#’)
}
}

2

I have no experience, but curious if this helps.

Tom