Onsen-UI how to dial with ng-click inside <ons-button>

Question

I am trying to make an ons-button using ng-click to dial a number when it is clicked, in both iOS & Android. I use Cordova framework.

I have used the followings but with no success:

    <ons-button ng-click="window.open('tel: {{69000000}}', '_system')">Call</ons-button>
    <ons-button ng-click="window.location.href('tel: {{69000000}}', '_system')">Call 2</ons-button>

In config.xml I have enabled

    <access origin="tel:*" launch-external="yes" />

Answer 1

I had the same problem, and in my case, I inserted a simple href. For example,
<a href="tel:123456789">123456789</a>
Hope this helps! :)