title: IOS Core Location framework accuracy
body: <p>I am writing an app in Swift to capture and save the location of the phone.<br>
  I am planning to use Core Location framework. This framework provides several services that you can use to get and monitor the device’s current location.<br>
  Here are a few questions I have: <p>
  1. Does Core Location framework uses the phone GPS to get the longitude and latitude or the cell data?<p>
  2. What if the phone is in your car, pocket, bag or purse. Can it still get a correct location (longitude and latitude)?<p>
  3. If the answer to #2 is false, then what other alternative I have?<p></p>