3 Replies Latest reply: Oct 22, 2011 10:55 AM by Allan Sampson
JayR3113 Level 1 (0 points)

My iPhone 4S constantly switches back and forth between WiFi and 3G.  Does anyone know why it would do this when my wireless router is only 15 feet away.  Why wouldn't it stay connected all the time?  I have no problems with the connection to my macbook.  Depending on what room I am in, I'd say its connected between 50% and 75% of the time.  This is my first smart phone, so maybe this is normal, I don't know.  I'd appreciate your feedback.

iPhone 4S, iOS 5
  • Allan Sampson Level 10 (123,405 points)

    When actively being used when connected to an available wi-fi network, the connection to the wi-fi network should remain.


    When the iPhone's screen is off or asleep and the iPhone has not be used for 5 minutes or so, the wi-fi connection will be dropped. When waking the iPhone up, it should quickly re-connect to the network - in a second or two.

  • JayR3113 Level 1 (0 points)

    Thanks for the info.  I just played around with it for a few minutes and it did stay connected when I was using an app or safari.  It was just when I was browsing the settings or looking at photos that it was switching.  Does switching back and forth put a big strain on the battery?  Because I've been having issues with battey life as well.

  • Allan Sampson Level 10 (123,405 points)

    You're welcome.


    I have never noticed my wi-fi connection being dropped when checking settings or looking at photos, etc. Not saying it hasn't for certain but if so, I haven't noticed it after using an iPhone for over 4 years now.


    The disconnect from wi-fi when not being used is to save battery. The same does not occur when the iPhone remains connected to a power source.