title: API to check network connectivity for a location
body: <p>I would like to know if someone here is aware of any APIs for figuring out cellular connectivity at a given location (in coordinates). This is for offline processing of some location data.</p>
  
  <ul>
  <li>Any network is fine. (t-mobile, verizon etc)</li>
  <li>Any language is fine for me.</li>
  <li>Paid APIs are fine too.</li>
  </ul>