pasing parameter to ng-click function within ng-repeat

I am using onclick="window.open('tel:+94777122240')" in my angular ionic application. which lets the user to open dial box when onclick. i am trying to pass values to the onclick function withing ng-repeat. but the ng-repeat values doesnt pass to fucntion

i have used this method to solve it. but it does not work

<div ng-repeat="branch in branches"> 
<a ng-click="window.open('tel:branch.telephone')" class="button">Call Now</a>
</div>

Angular expressions are evaluated against the scope. Try to move the ng-click function to the controller:

$scope.open = function(branch) {
    window.open('tel:' + branch.telephone);
}

<div ng-repeat="branch in branches"> 
<a ng-click="open(branch)" class="button">Call Now</a>
</div>