Will the iPhone still drain more power on WiFi with 3G/LTE on?

Discussion in 'iPhone' started by scyap, Dec 29, 2012.

  1. scyap macrumors member

    Dec 22, 2010
    As we all know, 3G/LTE drains battery faster than WiFi

    Would it still drain battery faster if I'm already connected to a strong WiFi and left my Cellular Data on?
    In comparison to being connected to WiFi with Cellular Data off

    and I just found out recently that the telco can control if you get a 3G switch on the iPhone5?
    I was demonstrated on an iPhone 5, iOS 6.0.2
    First a sim card which only shows ONE switch (combination of 3G & Cellular data switch), and another sim card shows two separate switches
  2. darster Suspended

    Aug 25, 2011
    If you are on wifi, you will use wifi for data, not 3G or LTE. I leave both on all the time, and do not notice any significant battery drain.
  3. iHelios macrumors member

    Jun 28, 2012
    Wouldn't hurt for the OP to test this and post the results ;)
  4. Beeplance macrumors 68000


    Jul 29, 2012
    For this very reason, I'm always skeptical so I turn off cellular data whenever I'm in a wifi area. When I leave, I turn it back on.:)

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