iPhone X Excessive Data Usage

I've been having this same issue. It started after the recent iOS 11 updates to my iPhone 7. Most of the usage comes from System Services under the "Apple ID Services" heading. It was hundreds of MB a day while still connected to WiFi. I have changed all the cellular settings like you, but Apple told me the same thing. They said it was a known issue and that the guys that made the software update saw it as a feature and not a bug. Their advice was to turn off cellular data but that pretty much prevents the phone from functioning as intended when off WiFi. This is frankly ridiculous that there isn't more of a solid answer from Apple. If their only answer is to upgrade my data plan then I'm ditching my iPhone.

Double check that the update didn't restore your Background App Refresh settings to WiFi + Cellular as it did for me. That was killing some data too.

Your concern is understandable but there are ways to manage data usage to avoid surprises of an unpleasant nature.

If all your settings are similar to what you had before and your active use of data has not changed much, the fact you have the iPhone X and iOS 11.2.1 would not explain dramatic changes in data usage as recorded by your carrier.

Clearly, something different is happening and you can identify and control it by monitoring what is using your data.

Check the cellular data usage on your iPhone and iPad - Apple Support

There are many useful apps available to monitor data usage and provide timely alerts. By way of caution, however, no app is completely accurate in terms of data usage as measured by the carrier which is the only thing that matters when it comes to billing.

Turn off WiFi assist - that feature will cause your phone to use cellular data whenever it feels the WiFi connection is poor and there would be an advantage to using cellular data.

About Wi-Fi Assist - Apple Support

Dennispetrone wrote:

wait, photos and vids aren't saved locally anymore? what that mean? all my photos and vids are local. not on iCloud. what is apple doing to us

Nothing.

Go to Settings -> iCloud -> Photos.

If "iCloud Photo Library" and "My Photo Stream" are off, your photos are not stored or sent to the cloud; if either are they may be:

• iCloud Photo Library: Your photos are stored on iCloud
• My Photo Stream: New photos get sent to all of your iCloud devices when they are on WiFi.

If you have cellular data turned off and it is still using data then either yes, something is definitely wrong with your device or a thief somehow cloned the SIM card that came with your iPhone X and is using their device to download data.

Apple is correct is saying that the phone should not use data while cellular is turned off.

Unfortunately, that does not necessarily mean the carrier would show no data being used during that period.

There is a rather big challenge for a user who is trying to match cellular data usage on the phone with carrier records. The user in looking at the carrier record sees data usage typically as it is invoiced rather than necesarily at the time it was actually used.

The problem relates to two separate issues: first, data usage recorded by the carrier is normally higher than what is recorded on the device and second, there can be major differences in timing as the phone records data as used while on the account data usage the carrier shows it when invoiced. For some carriers, especially, MVNOs, this makes reconciliation impossible.

So if your carrier is showing data usage while you actually have the phone turned off, it does not necessarily mean anything nefarious is happening.

However, if you are using a major carrier the lags between invoicing and use should not be large unless data roaming is involved.

Let's hope the matter gets resolved during your appointment.

Hi

Go to settings down to each app turn mobile data off on each one you only need to work with your wifi not mobile data.

Go to i books download ios 11 user guide &iPhone X guide both are free.

Cheers

Brian 🇬-1F1E7;

I live in Canada. There are 4 major carriers (hence why some of my posts are in French):

Rogers (and flankers)

Bell (and flankers)

Telus (and flankers)

Shaw (through Freedom Mobile only in BC, AB and ON).

In Quebec, Freedom is replaced by Videotron

In Saskatchewan, Freedom is replaced by SaskTel

Not all providers in Canada are listed, but the major ones are.

My phone definitely does not chew through data when the WiFi is on. I have everything running full tilt and I have never experienced this. I find the phone to be more accurate in terms of Data usage because it might take as long as 24 hours for it to even appear online under my account. I will agree that reconciliation would be almost impossible. Data roaming on my provider might take up to a month to be reflected, but once again, I would use the data logger on my iPhone.

None of those are MNVO's however. The flankers might, but I don't think so.

Well i had the same issue.. the new update of instagram was chewing my data as well as Facebook. Turn iff autoplay videos in The app on Facebook and select ‘use less data’ to stop autoplay in Instagram ;)

I am having this same issue. I had an iPhone SE before the X and never went to my max data usage. I always had about a gig of data rollover to the next month. The past two months, I have gone near my max 2GB. Throughout most of the day, I'm near a WiFi connection so I don't use much cellular data.

I checked the breakdown of my usage on my carrier's site and it showed my phone using cellular data while on a WiFi connection. It showed my phone using 100MB of data at 4:45AM on day. I was certainly at home at that time and always connected to WiFi when I'm home. I tried calling Verizon today, but the hold time was too long so I figured I'd come here to find an answer. I'm going to reset my usage stats on the phone and see what happens as my plan resets tonight.

If this is a known issue, or "enhancement" with the iPhone X, it should be have advised of that beforehand. I wouldn't have bought it. There should be some off/on switch to those features whatever they may be. Looking back, I should have bought the iPhone 8 and saved some money. I like the device, but the price and now the money I'm paying on data overages is certainly not worth it to me. Just my two cents.