There are many instructions online which can help you to understand better how the application works. This content will teach you what additional information you can get with a phone number. Having a phone number, I believe, you can also find out the location of the user. At least, you will determine his zip code area. Look for the description of all features of the application on the specialized forums, it is very helpful.

Hi, 

You can inherit the search view of the corresponding model and make the change as per the need. To inherit and modify the existing search view, you can refer this: Adding filters to existing search views

Thanks