In a helpful comment on this Android Stackexchange question, prominent contributor alecxs states:

google and OEMs will always have own backdoors in propritary [sic] blobs for baseband/modem etc - you are already hacked at moment of using smartphone

I have much respect for alecxs, and they have provided helpful answers to my questions in the past. So when alecxs writes something I don't already know, I pay close attention and try to learn form it.

Is it accurate that Google and OEMs always have backdoors in Android, and therefore one should consider any Android smartphone to be already hacked?

If so, why does the baseband/modem require such a backdoor?

  • 1
    For a lot of Open Source enthusiasts every closed source blob is a horror. As they can't look into it they anticipate the worst which means that the blob is insecure and contains backdoors. That is my understanding of such statements.
    – Robert
    May 16, 2022 at 7:13
  • Rob Braxmann has some nice videos about
    – alecxs
    May 16, 2022 at 15:33
  • 1
    I don't think you'll get an answer like "Yes. I have a proof". But after this we don't have a reason to believe the other way. May 16, 2022 at 18:39
  • 1
    google itself confirmed they can silently install apps without notifying you (although its no baseband hacking - google play required)
    – alecxs
    May 19, 2022 at 21:42
  • 1
    carrier can lock phone if you don't pay the bill xda-developers.com/google-device-lock-controller-banks-payments
    – alecxs
    May 19, 2022 at 21:49


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