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macrumors newbie
Original poster
Sep 5, 2012
I have this simple question about wifi assist that I can't seem to find the answer to.

If I have cellular data explicitly turned off for a specific app (like Safari or Facebook) under the "use cellular data for" section, but I have wi-fi assist turned on, which will take precedence? In a weak-wifi situation, will my phone use cellular data to maintain a connection for those apps, or will it honor the explicit "no cellular data for this app" choice that I have made?

The obvious answer is that it shouldn't ever use cell data for an app for which I have explicitly turned cell data off, but knowing Apple, wi-fi assist probably takes precedence. Please tell me which it is. Thanks.

I like the idea of wi-fi assist, but not for those apps that I have explicitly prohibited from using cellular data.



macrumors Sandy Bridge
Oct 17, 2011
When WiFi Assist kicks in your phone switches to using cellular data--even the WiFi indicator disappears in the status bar at the top--which would mean that the typical cellular usage rules would apply.
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macrumors Nehalem
Nov 30, 2013
Gotta be in it to win it
If you have cellular data turned off from an app, it won't use cellular data. I tried your scenario with safari and I received a message that cellular data was turned off.
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macrumors G4
Jan 8, 2012
Apps with cellular off takes priority.

I keep a few streaming apps off so I don't accidentally use them at the gym on LTE.

Very little data is used with wifi assist.


5mb in 2 months. And I live between wifi and cellular.


macrumors 68040
Sep 29, 2014
I have unlimited data both at home and on mobile so I leave everything on. Since last October I have used 31MB due to WiFi assist.
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