Data via 3G while calls via EDGE only for saving battery

Discussion in 'iPhone Tips, Help and Troubleshooting' started by aendaman, Oct 7, 2008.

  1. aendaman macrumors member

    aendaman

    Joined:
    May 28, 2008
    #1
    I am considering to get an iPhone. So I was wondering if there is an option to draw data via 3G while using only EDGE/GSM for calls. I know that this can save you a great deal of battery esp. when you do long calls while the quality for voice calls should be similar on 3G and EDGE/GSM anyhow...
    If this option does not exist, please everybody who likes that idea send feedback to :apple: !
     
  2. aristobrat macrumors G5

    Joined:
    Oct 14, 2005
    #2
    Haven't seen a way to independently toggle 3G data from voice.

    FWIW, in my area, a 3G (UMTS) voice call sounds a lot better than an EDGE (GSM) voice call. Not sure if it's the codecs AT&T uses for EDGE around here or what, but there's a huge difference.
     
  3. cube macrumors G5

    Joined:
    May 10, 2004
    #3
    EDGE is data, not voice. You are asking for GSM voice.
     
  4. aendaman thread starter macrumors member

    aendaman

    Joined:
    May 28, 2008
    #4
    Agreed, but you get the message... :D
     
  5. aendaman thread starter macrumors member

    aendaman

    Joined:
    May 28, 2008
    #5
    I am in Germany and here 3G is still relatively rarely used because GSM is just fine for voice calls... At least in cities where the coverage and signal strength is good.
     
  6. aristobrat macrumors G5

    Joined:
    Oct 14, 2005
    #6
    Lucky.

    Over here, most AT&T markets use a half-rate codec (AMR-HR) instead of a full rate one (for GSM). This compresses the conversation, which allows AT&T towers to service more GSM users, but the trade-off is that voice quality sounds worse. The voice quality of 3G is amazing in my area (compared to that).

    :(

    Are you sure that having the iPhone maintain connections to two separate networks (GSM/UMTS) would actually save battery life? :confused:
     
  7. wackymacky macrumors 68000

    wackymacky

    Joined:
    Sep 20, 2007
    Location:
    38°39′20″N 27°13′10″W
    #7
    It does save battery power to turn off 3G when you're not using it. I sometimes leave it off except when I'm on the net. I get an extra day between charges by doing it.

    The degree of power-saving is dependant on the strength of the 3G signal (if its weak the phone uses more power trying to maintain it)
     
  8. aendaman thread starter macrumors member

    aendaman

    Joined:
    May 28, 2008
    #8
    Thats a good point. I guess it could but i am not sure... Any other opinions on that?
     

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