How do we know iPhone using WiFi or 3G data?

Discussion in 'iPhone' started by iSayuSay, Dec 7, 2011.

  1. macrumors 68030


    Feb 6, 2011
    Got a simple question. How do we know if iPhone is using WiFi connection and not 3G if both are present?

    Does iPhone automatically override any 3G data service whenever WiFi is present? Or are there any specific services (apart from SMS/MMS) that being forced using 3G connection?

    I prefer not turning off Cellular Data, if that's possible.

    Thank you :)
  2. macrumors 6502a

    Big D 51

    Jan 15, 2011
    Mobile, AL
    Yes, wifi will override 3G when possible. If your phone is in 3G, it will
    have "3G" written in top task bar near your signal or the wifi signal when on wifi. I would post pics, but I'm using tapatalk on iPhone so not so easy.

    To turn off cellular data on ios5: Settings > general > network
  3. macrumors 68000


    Oct 3, 2010
    Paris, France
    The data status indicator at the top of the screen will tell you if your phone is currently using 3G or Wi-Fi (see attachments).

    Yes, as far as i know.

    Not that I know of, but I could be wrong.

    Attached Files:

  4. macrumors 603


    Apr 6, 2007
    Visual Voicemail is another example of when an iPhone will utilize 3G for data, even when connected to Wifi.
  5. macrumors 68020

    Dec 19, 2007
    i believe imessage also uses data rather than wifi (something i dreadfully hate)
  6. macrumors 603


    Feb 3, 2010
    United Kingdom
    Doesn't really answer your question, but I'll post this I found anyway:

  7. macrumors 68030


    Sep 8, 2011
    Eureka Springs, Arkansas
    Doesn't appear to... I was able to send an iMessage with "Cellular Data" turned off.
  8. macrumors 68000


    Oct 8, 2009
    nah, i send plenty of imessages on wifi! plus, if it needed 3G all those nice ipad and ipod touches wouldn't be able to imessage
  9. macrumors 68020

    Dec 19, 2007
    Youre right, but what i am saying is that imessage uses data before it uses wifi to send imessages. anandtech confirmed this iirc.

    i think we are talking about a couple different things. what i meant to say was that if you have data on, and wifi on, the iphone sends imessages with your data connection rather than using data.

    for me, its no fun as i live in an edge area and sending pics takes a while even though imessage :(
  10. macrumors 68030


    Jul 12, 2011
    Location: and
    well some of you guys are correct. However, I have this carrier here in nam that charge you data even tho you on wifi, and they SAY that they can't do anything about it since it's the iphone controlling that matter! Thoughts?
  11. macrumors demi-god


    Jul 24, 2009
    Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A405 Safari/7534.48.3)

    Turn cellular data off if it's an issue!
  12. macrumors member

    Sep 30, 2011
    true but it seems that i dont get any imesssages unless 3g is on same with picture text
  13. thread starter macrumors 68030


    Feb 6, 2011
    Well same thing happened to me when I was traveling abroad. I used a local prepaid SIM, and the I saw my credit keep falling little by little as I browse using WiFi. (Yes of course I checked WiFi is in-range and connected to Internet). And I didn't text, MMS or making any calls then.

    But I don't understand why the carrier was charging me over and over again. That's why I asked this question. Do anyone else having this problem? Especially with prepaid SIM?
    But truly, even for those who use data plan, this still annoying because it decreases your quota even while I'm using WiFi.

    Thank you for all kind responses. I guess there's no other way but turning off Cellular Data, huh? :( .. Well it's preferable to keep this data flow automatic, but if carrier still charging me my credit/quota while I'm on Wi-Fi, I better not take chances.
  14. macrumors 68030


    Jul 12, 2011
    Location: and
    of course that's wat I did rite after questioning them where were my credits from my prepaid sim.
  15. macrumors regular


    May 5, 2010
    La Vegas
    There is a solution for your slow edge sending pics if you are near wifi. Just turn on Airplane mode, and then turn wifi back on. When you first go into text app, it will tell you that you need cellular data or wifi. Just hit cancel and proceed as normal.

    If you are not around wifi, then sorry about your crap cellular area.
  16. macrumors 65816

    Jul 17, 2010
    iMessage uses wifi too. Thus, iPad and iPod Touches can text. If you're on 3G, iMessage will use 3G. If you're on wifi, iMessage uses wifi.
  17. macrumors regular

    Mar 12, 2008
    As a side note, Dataman is a great app for logging data usage. It splits it into wifi/3G. It's very interesting (and rather concerning) to see which actions transmit data, and how much. Btw, Dataman doesn't tell you which app is transmitting the data, but you can test apps data transfer
    yourself by using the Dataman log.

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