Add a “Dial Extension” Button to Contacts on iPhone

Though you’ve long been able to add automatically dialed extensions to contacts on the iPhone, the newest versions of iOS handle extensions much more intelligently, allowing you to create a “Dial Extension” button to any specific contact. That extension dialer can be activated manually, making the navigation of telephony menus infinitely easier, here’s how to quickly add this to a contact:

via Add a “Dial Extension” Button to Contacts on iPhone.