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Cellular Data in use even while connected to WIFI

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Cellular Data in use even while connected to WIFI

Hello All, On Saturday, my brother-in-law (who lives in Huston) posted an understandably angry post on Facebook regards his ATNT service. Apparently he has found that his mobile devices continue to use ATNT cellular data even after he has entered a WIFI covered area. Apparently, this is happening with all 4 mobile devices on his account, so his data usage and resulting charges each month are shooting through the roof. He included a link to an article written by a user with a lot of comments on this issue. More than a couple of people 'said that they had communicated with ATNT representatives and that the company was aware of the problem. Supposedly, the only sure fire sollution is to toggle cellular dana on and off from within the phone's settings. http://jirout.me/att-data-overage-fees/

So far as I know, I am not experiencing this problem, yet. I use ATNT, have an IPhone 6S, and move off and on wireless networks constantly. Can anyone shed some light on this issue? Thanks for any help.
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Message 1 of 7
Scholar

Re: Cellular Data in use even while connected to WIFI

There are a few things to review on the iPhone for data usage or to minimize data usage when connected to Wi-Fi.

  • To view the cellular data usage for your apps, tap Settings > Cellular. You can turn cellular data on or off for each app.
  • Is Wi-Fi Assit on?  With Wi-Fi Assist, you can stay connected to the Internet even if you have a poor Wi-Fi connection. For example, if you're using Safari with a poor Wi-Fi connection and a webpage doesn't load, Wi-Fi Assist will activate and automatically switch to cellular so that the webpage continues to load. You can use Wi-Fi Assist with most apps like Safari, Apple Music, Mail, Maps, and more.
    When Wi-Fi Assist is activated, you'll see the cellular data icon in the status bar on your device.
    Because you'll stay connected to the Internet over cellular when you have a poor Wi-Fi connection, you might use more cellular data. For most users, this should only be a small percentage higher than previous usage. 
  • Wi-Fi Assist is on by default. If you don't want your iOS device to stay connected to the Internet when you have a poor Wi-Fi connection, you can disable Wi-Fi Assist. Go to Settings > Cellular. Then scroll down and tap Wi-Fi Assist.
    With iOS 9.3, you can see how much cellular data you’ve used when Wi-Fi Assist is turned on.
Message 2 of 7
ACE - Sage
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Accepted by traveling-man
‎08-15-2016 12:28 PM

Re: Cellular Data in use even while connected to WIFI

My personal experience with iPhones is they often disconnect from wifi after iOS updates.  Factory resetting may be required to get them working correctly again.

 

What to try first:

Reset network settings or 'forget" wifi and sign in again.

Wifi assist should be off

Apps that you want limit d to wifi should be off in settings, under cellular data.

 

This is never a carrier problem.  These same complaints are made on other carrier forums (and apparently on Facebook).  In nearly every case the fault it's with the phone.  

Why is occurs in some phones and not others is unknown.  My mother's iPhone went 2.5 years before her wifi quit working.  My sons both had 5S and both had the problem.  My younger son has a 5 and it needs resetting every few months.

 

The problem is not limited to iPhone, but does seem to occur more often.

 

(The following is included after all posts to save typing) I don’t work for AT&T. My replies are based on experience and reading content available on the website. Our answers are honest, but not always appreciated. If you posted personal information, please edit and remove.
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*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.
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Message 3 of 7
Contributor

Re: Cellular Data in use even while connected to WIFI

Thanks for your reply. Apparently he has tracked gigs of data being used at night, while the phones were in a secure location, while the family was asleep. 

Message 4 of 7
Tutor

Re: Cellular Data in use even while connected to WIFI

I have wondered if the night use of mobile data every three hours was due to auto updates that use data instead of the WiFi.  Have not been able to get any satisfying answers.

Message 5 of 7
ACE - Expert

Re: Cellular Data in use even while connected to WIFI

I have wondered if the night use of mobile data every three hours was due to auto updates that use data instead of the WiFi.  Have not been able to get any satisfying answers.

@tombjtkan That is certainly a possibility but most phones don’t do software updates over cellular (or that can be disabled in settings) and data reporting is not real-time. Those data reports you see every 3 hours do not necessarily mean that was when the data was used. The actual usage could be many hours to several days earlier.

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*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.
Message 6 of 7
Associated Member

Re: Cellular Data in use even while connected to WIFI

When I worked in the Cellular industry, I do remember this was a fairly common problem that was usually fixed with OS updates. My recommendation, whether or not it happens, is to disable cellular data manually when your using WiFi. As far as using data when the phone is not being used (at night), it is more than likely apps that are installed and running in the background. Facebook, for example, is notorious for the amount of data it uses, even if you're not using the app.

 

PS: It isn't specific to any one carrier (AT&T, Verizon, T-Mobile, etc..), it's a manufacturer / OS issue.

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