3G Connection + Battery Life

Discussion in 'iPhone' started by player2, Jul 12, 2008.

  1. player2 macrumors member

    Joined:
    Jul 12, 2008
    #1
    Ok I am thinking of getting this but after reading lots of stuff on it I have a few questions that hopefully you can help me out with.

    Currently I have Sprint and anytime I want to login to the internet it connects to the EVDO service so it is not always on unless I leave it connected.

    With the iPhone is 3G always connected? Or does it just go into a 'sleep' mode if you will to help battery life when not using it.
     
  2. tomjleeds macrumors 6502

    Joined:
    Jul 19, 2004
    Location:
    Manchester, UK
    #2
    3G handles both voice and data on the new iPhone unless there's no signal, in which case it drops back to GSM, and it works the same for both. Think of when you make a call - the battery drains heavily dependent on talk-time, and the rest of the time you're still 'connected' to the network, but not active. The same goes for 3G data, it'll only drain heavily when you're actually browsing/streaming/etc.
     
  3. player2 thread starter macrumors member

    Joined:
    Jul 12, 2008
    #3
    Oh ok...

    So kinda unrelated...but to switch to Wi-Fi does it automatically detect or do you have to manually tell it to use that over 3G?
     
  4. scariaga macrumors regular

    Joined:
    Aug 24, 2007
    #4
    I'm curious about this, I noticed how there is this "enable 3G" option in the settings. Should I take turn that off when I'm using wifi? would it help the battery life to take this off periodically? :confused:
     
  5. Lexoticstylez02 macrumors 6502a

    Lexoticstylez02

    Joined:
    Oct 11, 2007
    Location:
    Orlando, Florida
    #5
    I've been turning 3G off.. and only having it on when I need to.

    Seems to help a bit.
     
  6. Sphyrna macrumors regular

    Joined:
    Jul 9, 2008
    #6
    If you're connected to WiFi it will automatically use it for data. However, as pointed out, the 3G will still be on for voice (unless you turn it off in the settings).
     
  7. tomjleeds macrumors 6502

    Joined:
    Jul 19, 2004
    Location:
    Manchester, UK
    #7
    It will use WiFi for data, but still use 3G for voice unless you turn 3G off...in which case it'll default back to GSM for voice. You're looking at a miniscule amount of battery saving there - it's only when you're in a call or transferring data that the battery life difference between 3G and GSM becomes apparent.
     
  8. scariaga macrumors regular

    Joined:
    Aug 24, 2007
    #8

    ok good to know, thanks
     

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