Hi Raymond, in answer to your questions:
1. If you click on a listings phone number whilst on a smartphone, you should receive a prompt to call that number. The demo site doesn't have real numbers listed, however if you open a listing on your phone
like this and click the number, you'll be able to see it for yourself.
2. If you mean, outside of the standard search functionality, then yes you could potentially do this, however it would require customization on your part. On a related note, there is a plugin available in the AppThemes marketplace, called
Multi-City AV which allows you to add a location search filter on the homepage. Thanks :)