at&t wi-fi calling in airplane mode works but not when cell is enabled

Discussion in 'iPhone' started by bbensten, May 25, 2016.

  1. bbensten macrumors newbie

    May 25, 2016
    I have an iphone 6s that will only go into "at&t wifi" mode when the phone is switched into airplane mode and then the wireless is turned back on. It does not matter how weak the cell signal is (often no service) it will not come on unless I actually disable the cell. Is anyone else having this issue? The only reason I really care is that I often visit an area that literally has no cell service but the wireless network is strong. Manually entering into airplane mode and back out is easy enough but annoying.
  2. avanpelt macrumors 68030

    Jun 2, 2010
    Does your phone detect a strong Wi-Fi signal? No one seems to know what the exact criteria is that makes the phone switch to Wi-Fi calling when the AT&T cell network is still reachable; but anecdotal evidence suggests that the phone should switch to Wi-Fi calling automatically if the Wi-Fi signal is strong and the AT&T cell signal drops to one or two "dots".
  3. bbensten thread starter macrumors newbie

    May 25, 2016
    Very strong wifi signal. I actually find anecdotal evidence that it kicks in more frequently when the wifi signal is weaker then when it is at full strength. In my case the cell service literally says "no service". Any help is appreciated.
  4. kch50428 macrumors 6502


    Oct 30, 2015
    North Iowa
    My Verizon iPhone6 wifi calling seems to kick in when cell signal goes below two full "bars" and switches back to cellular when it's something just over two full "bars" yet less than three...
  5. bbensten thread starter macrumors newbie

    May 25, 2016
    A few pictures are worth a thousand words.. Just now on my home network. Enable airplane mode, perfect. Turn off airplane mode, no att-wifi.


    Attached Files:

  6. lordofthereef macrumors G5


    Nov 29, 2011
    Boston, MA
    Att prioritized the cell signal. This means that, if you have a usable cell signal, it will not kick in wifi calling. I believe Verizon is the same way. T-Mobile is the only carrier I am aware of that prioritized wifi calling over cell signal. This is a carrier decision and there's nothing you can do aside from voice a complaint and hope enough others do the same.
  7. bbensten thread starter macrumors newbie

    May 25, 2016
    I would agree with that assessment except that it still does not kick on even when there is "no service" displayed on the phone and a full strength wifi signal. Again, if I then engage airplane mode, it will come right on in that situation too.
  8. robnbill macrumors member

    Jul 5, 2007
    Northern VA - Fairfax Area
    I have AT+T too. It always kicks in when the strength signal goes to 2 or 1 dots. It switches back and forth - and it has been 'transparent' on all calls. You may want to make sure you have latest carrier update. I think it's 24.1 -- Settings | General | About | Carrier. I think LTE plays into it too - we normally have LTE.
  9. AutoUnion39 macrumors 601


    Jun 21, 2010
    Try restoring your phone and/or updating your carrier settings. Mine kicks in pretty quickly when I have "one dot."

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