Since recently updating my iPhone 5s to iOS 10.3.2, AT&T is messaging me about prodigious date consumption, to the point of overage on my monthly data plan, only three days into a new billing period. I have not changed any settings or use patterns (and "wifi assist" has never been enabled). Tech support guided me through a number of data saving tips, all of which I have already done for years.
Anyone else experiencing this?
Restore the phone via iTunes.
If the problem remains, Restore again and set up as new. Best of Luck!
President - MacGroup Detroit
"What if the Hokey Pokey really IS what it's all about?"
What I've noticed about updates is that
they often activate settings that I
have previously turned off. This latest
update was no different.
Background app refresh is notorious for
turning OFF settings back ON.
Auto Updating can burn through data, as well.
I have checked to see that Background App Refresh has remained OFF (it has). I have also always disabled Cellular Data for all but a few items, like mail, Find My Mac/phone/ipad, And of course, shut down "WiFi Assist" since it first appeared.
I'm pretty sure AT&T's "odometer" on my usage missed the turnover at my 16th of the month billing date and didn't zero me out.
Have spent some time with actually nice, helpful account and tech support folks, all right here in 'Murica. Have changed over to a better, but less expensive, Data plan for our two phones and will monitor data use to see if there's indeed an identifiable culprit that might have been draining my bytes.
You might also take a look at Settings > Privacy >
"Location Services". The apps under this section
have settings of "Always/Never/While using" that
I've had to go in and set to Never or While Using.
Most of these are turned On by default.
There is a "myATT" app that you can download
from the iTunes Store that may be helpful
in keeping a eye on your Talk/Data/Text usage.
Hope this helps,