I would like to buy a factory-new tablet (Galaxy Tab S6) so I would like to check if the device has ever turned on (since the production date) and also how to make sure no factory reset has done yet.

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    – Andrew T.
    Jul 28, 2022 at 20:48

1 Answer 1


You can use ##786#. You can check RTN status of mobile. But you need to access hidden menu then you can use this code.

You can find uptime of mobile Go to setting / about phone / uptime. Compare it with date of purchase.

  • 1
    Uptime is Uptime since boot, not reset.
    – Firelord
    Feb 16, 2021 at 18:25
  • When reset uptime start from beginning and if you compare it with date of purchase. You can find mismatch.
    – aliz lopaz
    Feb 17, 2021 at 8:23
  • @alecxs, It will not reveal date of firstboot/ factory reset. When you factory reset mobile, uptime will start from 0. Now you have factory reset 1 month ago and you purchase mobile 2 year ago. When you compare it will mismatch. And you find when was factory reset mobile.
    – aliz lopaz
    Feb 18, 2021 at 8:45
  • 1
    You are rite. Every boot uptime change.
    – aliz lopaz
    Feb 19, 2021 at 9:14

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