A phone has mobile data turned off.

No wifi antennae is connected. We were in the wood, on the hill, minimally 3 km from the nearest village. The nearest, higher hill, has a mobile antennae. So, the mobile signal was on. Even if there was a wifi antennae, I hadn't connected to it.

So, obviously, no Internet connection was active.

But the phone suddenly decided to update the Android OS. And started to download the update. It was even finished - in 5 hours - without internet being on. How could it be downloaded? Will I have to pay for those data? (the phone has no prepaid Internet)

The device is ASUS ZenFone 3 Max.

  • Can you see the update download progress percentage?
    – MANI
    Jul 31 '17 at 7:47
  • You can check the OTA updates location and see the time android.stackexchange.com/q/32205/131553
    – beeshyams
    Jul 31 '17 at 7:48
  • @MANI Yes, I have seen that progress (about 5 hours), and it was even finished - without internet being on.
    – Gangnus
    Jul 31 '17 at 10:12
  • @beeshyams The phone was(and is) apart from Internet for 2 weeks uninterruptedly.... I will try to check.
    – Gangnus
    Jul 31 '17 at 10:16
  • I honestly don't see how this is possible if you had mobile data turned off (meaning actually disabled, not just not paid for) and WiFi off. If mobile data was on it could have downloaded the updated on 2G (which would also explain the 5 hours time). Does your Data Usage in Settings show anything recently for WiFi or Mobile Data?
    – acejavelin
    Jul 31 '17 at 14:03

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