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cell phone consumes mobile data when mobile data is off, especially when rebooting

Discussion in 'Android Devices' started by Gaggz, May 13, 2019.

  1. Gaggz

    Gaggz Lurker
    Thread Starter

    Hi. I have Samsung S9 plus and sometimes use it with a cellphone connection from overseas. While on international roaming, it costs me lots even if I use few kb of data, hence I turned the cellphone mobile data off (WiFi is on). I noticed on Samsung Galaxy S9 plus that even when mobile data data is off , the cell phone uses very little data especially when rebooting. After rebooting it does not consume cell data. On the other hand, I have Google Nexus 6P and it NEVER uses mobile data when mobile data is turned off, even while rebooting. I was wondering why the S9 plus "steals" some data especially when rebooting and Nexus 6P does not. Also, would appreicate an recommendation on any other Google or Samsung phone that will never use or steal data when mobile data is turned off, even while its rebooting. Thank you!

  2. bcrichster

    bcrichster ROMinator

    I would "assume" it's likely a service location check, like a ping to see which towers you're closest to and check Samsung servers for updates. I don't really use Sammy devices so this is simply speculation
  3. Gaggz

    Gaggz Lurker
    Thread Starter

    I have tried this in separate bill cycles using each mentioned device. There is a data usage, broken down into time and date which coincided around time of S9 plus device reboot. I am billed a good amount for even small data usage. Such bills never came up when sim card was placed in Nexus 6p (standby or reboot). Hence I the conclusion.
  4. kate

    kate Dreaming of Bugdroid.

    Did you only turn mobile data off, or turn Airplane Mode on?

    If you just had mobile data off I'd try also enabling Airplane Mode when you reboot, that might keep data off when it restarts.
  5. mikedt

    mikedt 你好

    "hence I turned the cellphone mobile data off"

    In addition to that, check the International Data Roaming setting is OFF as well.
  6. Gaggz

    Gaggz Lurker
    Thread Starter

    Thank you everyone for your help!
  7. James_Watson

    James_Watson Android Enthusiast

    Thanks for your information. I would like to check my device, too.
    But would you like to tell me how to check whether it will use mobile data while rebooting? Thank you in advance.

Samsung Galaxy S9 Plus Forum

The Samsung Galaxy S9 Plus release date was March 2018. Features and Specs include a 6.2" screen, 12MP camera, 6GB storage, Exynos 9810 processor, and 3500mAh battery.

March 2018
Release Date

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