What does persistent wi-fi mean?

Discussion in 'iPhone' started by jpetticrew, Apr 9, 2010.

  1. jpetticrew macrumors 6502a

    jpetticrew

    Joined:
    May 13, 2009
    Location:
    Texas
    #1
    The new features slide in yesterday's announcement said something about persistent wi-fi. What does that mean, versus what the wi-fi connection in iPhone already was?
     
  2. maflynn Moderator

    maflynn

    Staff Member

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    May 3, 2009
    Location:
    Boston
    #2
    Currently when you lock the iPhone, the wifi connection is terminated (I'm not sure if the wifi transmitter is turned off as well) and it will reestablish the connection once you unlock the phone.
     
  3. tac22 macrumors 6502

    Joined:
    Jun 16, 2009
    #3
    ooh i was curious about this too...

    On my ipod touch when i lock the screen many a times it will lose wifi connecting until i wake i up and reconnect (I presumed to save battery, though was a pain in the ass for sms apps)

    maybe it keeps its wifi connection even when locked

    Or maybe its something else:confused:
     
  4. goobot macrumors 603

    goobot

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    Jun 26, 2009
    Location:
    long island NY
    #4
    im glad for the ipad. i had 3g on my phone so it didnt matter to me on that but on the ipad.
     
  5. retroneo macrumors 6502a

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    Apr 22, 2005
    #5
    I believe it's for the iPod touch and iPad WiFi, so they can receive push notifications instantly while asleep. Currently they only check every 15 minutes while asleep.

    Unfortunately, it will hurt battery life. It's unnecessary on the iPhone and iPad 3G as push notifications run over cellular so the WiFi can stay powered down to save battery.
     
  6. pooryou macrumors 65816

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    Sep 28, 2007
    #6
    Would this not be something you could disable in preferences?
     
  7. WilliamG macrumors G3

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    Mar 29, 2008
    Location:
    Seattle
    #7
    FWIW, the persistent wifi is not available for iPhone. Only iPod touch.
     
  8. DomC macrumors 6502

    DomC

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    Jul 28, 2010
    #8
    Since I'm using mostly wifi for data and have 3G data turned off, is there a way to make a profile of some kind to have persistent wifi on my phone?
     
  9. itsmemuffins macrumors 68030

    itsmemuffins

    Joined:
    Jun 23, 2010
    #9

    Works on iP4.


    You don't need to do anything but have wifi on.

    At home I have data of and wifi on I still get push.
     
  10. DomC macrumors 6502

    DomC

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    Jul 28, 2010
    #10
    The problem is, it's not working as it should. I have a 2G iPod and it's got the persistent thing down. The 3G iPhone is not persistent.
     
  11. terps2005 macrumors member

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    Jun 16, 2009
    #11
    My iPhone 4 doesn't stay connected to wifi either
     
  12. moussekateer macrumors 6502a

    moussekateer

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    May 12, 2009
    #12
    Persistant wifi isn't available on iPhones, even the iPhone 4. It doesn't make sense considering you have a network connection.
     
  13. bripab007 macrumors 6502

    Joined:
    Oct 12, 2009
    #13
    The persistent wi-fi feature is for iPod Touch only, not any iPhones. iPhones have been able to have persistent wi-fi since 3.x.x, if the app is coded for it, for some time. This new feature is just so that iPod Touch can have persistent wi-fi as a global feature, not dependent upon an app.
     
  14. LSUtigers03 macrumors 68020

    LSUtigers03

    Joined:
    Apr 9, 2008
    #14
    I can lock my iPhone 4 with all cell data off and Sirius or Pandora streaming keeps going and I can still SSH. So I've had no problems locking my phone and still using wifi.
     
  15. kas23 macrumors 603

    kas23

    Joined:
    Oct 28, 2007
    #15
    If I'm in the middle of a downloading a file on iCab, for an example, and I hit the home button on my iP4 and then lock it, it will disrupt this download. I don't believe this is supposed to happen with persisent WiFi.
     
  16. itsmemuffins macrumors 68030

    itsmemuffins

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    Jun 23, 2010
    #16
    Persistent wifi doesn't work on the iPhone 3G it does on the iP4.
     
  17. ocelo macrumors newbie

    Joined:
    Aug 9, 2010
    #17
    That is correct, my iP4 is always connected via wifi so i get push notification at home but my dads 3gs with the same OS version lose the connection after the screen is locked.
     
  18. itsmemuffins macrumors 68030

    itsmemuffins

    Joined:
    Jun 23, 2010
    #18
    Yep. It's because of the extra battery power of the iP4.
     

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