title: Determine data signal strength
body: <p>I know that it's possible to determine the data connection type (WIFI/or cellular) through Android, but is it possible to determine the cellular connection type and strength?</p>
  
  <p>I have an app that downloads some images and I have found that on GPRS or on 3G with weak signal that this download process slows up the app unacceptably. What I want to do is say that if you have either WIFI or a strong and fast data connection then download; otherwise display a default placeholder image.</p>
  
  <p>Any clues on how to do this?</p>