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Editorial Team
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Asked: 2026-06-13T23:16:38+00:00

I’m facing a big problem with my low cost tablets from China. Serial number

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I’m facing a big problem with my low cost tablets from China. Serial number is the same, device id from telephony is the same and now I discover that also Settings.Secure.ANDROID_ID is the same on each device.

How Settings.Secure.ANDROID_ID is generated?

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  1. Editorial Team

    You can read this here http://developer.android.com/reference/android/provider/Settings.Secure.html#ANDROID_ID

    Android ID:
    A 64-bit number (as a hex string) that is randomly generated on the device’s first boot and should remain constant for the lifetime of the device. (The value may change if a factory reset is performed on the device.)

    But on the Androids Developers Blog they write about your problem and show you a solution.
    http://android-developers.blogspot.in/2011/03/identifying-app-installations.html

    ANDROID_ID seems a good choice for a unique device identifier. There are downsides: First, it is not 100% reliable on releases of Android prior to 2.2 (“Froyo”). Also, there has been at least one widely-observed bug in a popular handset from a major manufacturer, where every instance has the same ANDROID_ID.

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