07-15-2016 08:54 AM
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  1. Windows Central Question's Avatar
    Since buying my 950XL at launch I have experienced a periodic problem where the "System" process is using lots of mobile data, putting me over my limit for the month. The first I know about this is when i get a text warning me I've used almost all of my allowance. Data usage for other apps, particularly those which run in the background (email, Facebook etc) is fine and in line with what I would expect, but there is clearly something going on at the system level which I can't trace.

    I have disabled the option to use mobile data if wifi is unavailable, turned off automatic backups, store updates and phone updates, one drive photo backup etc. It did seem that Calls+ was constantly checking call waiting status, and when I stopped this running in the background the situation improved, but I am still using a fair amount of data.

    This is becoming very frustrating-is there anything any other users have found that can help with this issue? I'm on the latest insider build and firmware and all store apps are up to date.

    As another datapoint, my wife has the same issue with her 950, but m ore extreme-hers is using mobile data even when this is switched off completely in options.
    01-25-2016 06:06 AM
  2. peashooter14's Avatar
    I bet you have a pending phone update...could be 2-4 gigs....use wifi and check the phone update settings
    01-25-2016 10:58 AM
  3. peashooter14's Avatar
    Also, it takes many days to download all of your text messages
    01-25-2016 10:58 AM
  4. peashooter14's Avatar
    it may take 1-2 weeks for all the data to stop. Your battery will suck too as long as there is a background download of the phone updates.
    01-25-2016 10:59 AM
  5. Joel S.'s Avatar
    Oddly enough, I started seeing a similar issue on my fiances phone. Her data is off, and she's used ~500GB already for the billing cycle. (We've had the phones since AT&T launch).

    This evening I'm going to remove the GMail account from her phone and see if that helps at all. Also need to make sure she's updated (current is .63 I think... I'm on the IP). The system should not download OS updates when it's not on Wifi unless you explicitly tell it to.

    Have you setup the Data Usage App? It can cut off background data when you're near the limit, or turn it off outright. Note: the app appears to force close when setting the background data options if the cellular data is turned off.
    01-25-2016 11:44 AM
  6. peashooter14's Avatar
    Also, if you have your email setup to download all items, it will sync your email history (big data)
    01-25-2016 12:19 PM
  7. Joe920's Avatar
    Her data is off, and she's used ~500GB already for the billing cycle
    I hope that's MB not GB?! I'm curious if everyone here is on ATT. I had the same problem, huge data use reported by ATT, but not by the phone. BTW, scrolling down the list of apps that used data, all the way at the bottom is system, even when sorting from large to small usage. For me it's 170MB right now, sitting at the bottom of the list for some reason.
    01-25-2016 12:20 PM
  8. tgp's Avatar
    Which carrier are you on? I've only ever had discrepancies in reported data usage on a prepaid carrier. I used to use Net10 AT&T. One time I was throttled because they said I used all my allotted data. I checked the data usage app on my (Android) phone and it showed about what I normally use. I asked them to restore my data but they didn't. I did eventually get the problem taken care of; I switched to GoPhone. I never again had any issues with Net10!

    On my Nexus 6 with Verizon service, my phone's Data usage reports exactly the same as Verizon does. Last month I checked the data usage close to the end of the month, and they showed exactly the same at over 135GB (I don't remember exactly what it was; only that they matched).
    01-25-2016 12:54 PM
  9. Joel S.'s Avatar
    lol, yea, it's MB, whoops.

    FWIW, we're only about a week into the current billing cycle.
    01-25-2016 02:02 PM
  10. GizmoEV's Avatar
    My Wife's 950XL has been doing the same thing. The high data use is usually when she isn't on WiFi. System has used 7.27GB and OneDrive 1.22GB. It looks like the usage numbers include WiFi and cellular data. The Overview screen doesn't even show any data for SIM 1. Also, what is Maritime?
    wp_ss_20160131_0001.jpg
    Any one hear of any fixes?

    This is on AT&T and only has 1 SIM.
    01-31-2016 08:45 PM
  11. signal-2-noise's Avatar
    I've noticed the high data usage as well on my 950XL. 'System' lists 1.14GB used. I've had this WP for only about 3 weeks and my monthly limit is 2GB. My 930 with moderate use would rarely get over 700MB of cellular data usage in a one month period. I've reported this on Windowx Feedback and is very concerning.

    SIM2 (which is empty) is also showing 1.11GB of data. This is crazy.
    01-31-2016 10:29 PM
  12. GizmoEV's Avatar
    I was reading a similar thread in the 950 forum and it appears that the Sync messages between devices might be the culprit. This is set under System|Messaging. If you go to System | Battery saver | Battery use and find MsgMmsTransport. Tap it and select Details. It shows Cellular data: 89.7% on my Wife's 950XL with 0% on WiFi. I've turned off the message sync between devices to see what happens.
    signal-2-noise likes this.
    01-31-2016 10:50 PM
  13. mikepalma's Avatar
    @thurott revealed this. Hello class action, great for us lawyers
    02-02-2016 01:26 AM
  14. Andrew Suppa's Avatar
    Well, did it help at all? I had to disable data for the second month in a row and it kinda sucks. I might go back to my 920 for this.
    02-03-2016 01:33 PM
  15. signal-2-noise's Avatar
    Since turning off auto backup sync and SMS messaging Sync Across Devices my data usage has been at 'normal' levels.
    02-03-2016 02:37 PM
  16. tdavi82's Avatar
    I am going to try that out signal-2-noise. I am on wifi so much that I hardly use cellular. For the past 4 years my cell data usage is less than 500MB a month. Usually around 300-450MB. I got the Lumia 950 a few weeks ago. Within my first two weeks of having the phone my data was over 3.6GB! It is now a new billing cycle and its been 5 days. I am the highest consumer on my bill at 330MB. If that trends then I will consume over 2GB a month while being on WiFi over 95% of the time.

    The highest cell use is System. Here are a few things I already have disabled and I guess it didn't help.
    - Turned off 4G speed
    - turned off most apps running in the background
    - Hold back button and close apps. IE will consume data and battery even if you do not have it open.
    - Only download updates and podcasts on wifi
    02-05-2016 11:52 AM
  17. lankylars's Avatar
    Also, what is Maritime?
    Anyone discovering what's going on? I have a 950 XL dual SIM on AT&T (on normal Windows Mobile build .29). Everything has been fine until today, when I got a notice that I'd consumed 3.6 GB of data out of my 4.5 limit (including rollover). I have never come close under normal usage and have had this phone since late November. Checking my AT&T data usage, I notice that almost all of the data use occurred over a weekend when I wasn't on WiFi. It shows data consumption at a rate of ~120MB per three hour reporting window, at all hours of the day. I know I was not actively using data during that time, at all.

    The Data Usage app is not helpful for isolating what is being sent over WiFi versus SIM, since it aggregates everything, so I can't full isolate the culprit. However, of about 22 GB of data used between all sources (WiFi, AT&T SIM and mysterious usage attributed to empty SIM 2 slot), system has consumed 14GB.

    Also, in Data Usage, why on earth is SIM1 (named AT&T by me), called "Maritim"?

    Has anyone disabled messaging sync and seen a reduction in this wasteful data? Messaging only accounts for 222MB of total data sent - about 1%.
    02-12-2016 01:07 PM
  18. GizmoEV's Avatar
    Has anyone disabled messaging sync and seen a reduction in this wasteful data? Messaging only accounts for 222MB of total data sent - about 1%.
    I disabled messaging sync on my Wife's 950XL Dual SIM and her data use dropped dramatically.

    On my 950XL Single SIM, I didn't have the high data use before or after installing the .107 insider build.
    02-12-2016 02:34 PM
  19. signal-2-noise's Avatar
    ...
    Has anyone disabled messaging sync and seen a reduction in this wasteful data? Messaging only accounts for 222MB of total data sent - about 1%.
    You should read the entire thread. Yes.
    02-12-2016 02:34 PM
  20. lankylars's Avatar
    You should read the entire thread. Yes.
    I did; however, there have been conflicting accounts of this across various threads in this forum. Will turn it off and monitor the situation.
    02-12-2016 03:01 PM
  21. EliteMikes's Avatar
    I just had this happen to my devices. My 950xl is out for repair so I haven't noticed it on mine, but my wife's did have the issue. Also, i have a lumia 830 on the latest builds that really raised the red flag for me. Someone that barely uses 500MB was at 5GB this month. I'm not happy. I had to set my at&t plan to the next tier.

    On another note. I have the latest build on my old 920 and the performance isn't too bad anymore. What is sad about that, I don't feel like the 950xl is much better than the 920 in certain areas.

    I am really confused by at&t billing. I'm hoping the time frames they list are wrong because I would be home sleeping. When I'm at home, I use a microcell which wouldn't go against my data limits no matter if this bug was kicking my butt.
    Last edited by EliteMikes; 02-12-2016 at 06:03 PM.
    02-12-2016 03:13 PM
  22. Furocan's Avatar
    It's already July and in less than a month the Anniversary Update will be released, but also with the Firmware Update yesterday and the newest Insider Build (14383) my Lumia 950 eats serveral MBs per hour :/

    I was following all the hints, disabled the message sync and so on but nothing has solved this issue.

    Is there really no solution for this annoying problem?
    07-08-2016 08:37 AM
  23. Summer_Moon's Avatar
    It's already July and in less than a month the Anniversary Update will be released, but also with the Firmware Update yesterday and the newest Insider Build (14383) my Lumia 950 eats serveral MBs per hour :/

    I was following all the hints, disabled the message sync and so on but nothing has solved this issue.

    Is there really no solution for this annoying problem?
    The above listed issues in the thread should have been resolved. If you're noticing high data usage then I would take a look at both battery usage and data usage and see what the top 3 apps are that are using battery and data.
    07-08-2016 09:05 AM
  24. Furocan's Avatar
    The above listed issues in the thread should have been resolved. If you're noticing high data usage then I would take a look at both battery usage and data usage and see what the top 3 apps are that are using battery and data.
    It's like everyone said "System" that continuesly consumes several MB per hour. If I look at the Battery Usage there is currently "Settings" the highest Battery drainer but only in usage and it's because I was searching for several options (while the Cellular Data was disabled). There are nearly no app that works in the background. For example "WhatsApp" is the highest with using 3% in the background.
    07-08-2016 09:19 AM
  25. PGrey's Avatar
    It's like everyone said "System" that continuesly consumes several MB per hour. If I look at the Battery Usage there is currently "Settings" the highest Battery drainer but only in usage and it's because I was searching for several options (while the Cellular Data was disabled). There are nearly no app that works in the background. For example "WhatsApp" is the highest with using 3% in the background.
    Right, because some of your WhatsApp and other Background tasks are using calls that register as system (kernel). The usage graphing does its best to differentiate this data/battery, but some of this is very tricky.
    If you look at the your WhatsApp battery AND data usage, you'll probably notice they cover the majority of high use, in the background. That's what they're designed to do, updating constantly, but it comes at a price.
    One option (if the app supports it) is to reduce the frequency that it updates, to something more reasonable, 15/30/60 minutes, or similar. In particular "push or poll" where, it constantly receives interrupt notifications of changes is VERY data and battery intensive, but that's a choice the user makes, in order to get absolute up-to-the-minute data, when the app is opened, rather than waiting a short time to update.

    You have to decide, if you want to limit your background data and battery usage, exactly what's important to be up-to-the-minute when you open an app. If you choose "everything", well, then you're also choosing to take a pretty big constant battery/data usage hit, over the course.
    07-08-2016 02:45 PM
32 12

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