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Support Does Mobile data turn off when Wifi is on?

Discussion in 'Android Devices' started by Kaiser17, Sep 21, 2011.

  1. Kaiser17

    Kaiser17 Android Enthusiast
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    Just curious does mobile data (4g/3g/1x) turn off when I turn on my Wifi? Or does it run together?

    Because on my old phone the LG Optimus when you have wifi turned on, mobile data turns off which saves power and does all the data stuff through wifi such as calls, browsing, etc.

    Also on the optimus when wifi would be turned on the mobile data symbol such as 1x or 3g logo would go away so I knew mobile data was turned off but on the indulge when I turn on wifi the mobile data symbol 4G still shows so I am unsure if mobile data turns off when I turn on the WiFi on the indulge.
     

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  2. k0nane

    k0nane Android Expert
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    Yes, it turns off.
     
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  3. Kaiser17

    Kaiser17 Android Enthusiast
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    So even that the 4G logo is still there the connection is turned off if I am correct?

    Sorry, have been asking for alot of help lately, but im experimenting with battery life.
     
  4. polywood223

    polywood223 Well-Known Member
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    Put it in airplane mode then widow it will last about 6 hours
     
  5. Kaiser17

    Kaiser17 Android Enthusiast
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    Just tested it, doesn't turn off. Turned on wifi and went to about phone where it shows mobile data connected so it stays on. But if you turn of LTE and stay in CDMA mode then it works.
     
  6. LBPHeretic

    LBPHeretic Android Expert
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    In a sense it does turn it off in that Wi-Fi supersedes mobile data for virtually all data transmission while it is turned on. The mobile data remains connected for things like a multimedia message to be sent or received, but it is essentially dormant and consuming little to no power while Wi-Fi is connected.

    So, because Wi-Fi handles the data while it is on and connected, battery is saved because Wi-Fi generally uses quite a bit less power than mobile data. You can TOTALLY turn off mobile data in the Settings menu, but then you would not be able to send or receive multimedia messages or use carrier services that require a mobile data connection.
     
  7. ppeklak

    ppeklak Newbie
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    besides MMS, what kind of stuff has to be done over 3G or 4G as opposed to wifi?
     
  8. ChuckFFarrell

    ChuckFFarrell Newbie
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    Thanks. Does this apply to most (or all) Android phones? I have the HTC Inspire on AT&T, so if I have both WiFi and Mobile Data on and the phone has a WiFi connection, then all data (internet, email synch) is through Wifi, not the mobile data connection?

    Ran a test at work. Left WiFi on and turned on Mobile Data. Let the phone synch to corporate email all day (every 15 minutes). Checked my usage through AT&T and no data plan usage recorded. So I have to conclude that with both on and a good WiFi connection, the phone uses Wifi.
     
  9. tiede

    tiede Android Expert
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    In theory, yes. Now I don't know if att won't still try charging you for data, but it should be that all data, aside from mms, goes through wifi then.
     
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