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How to start Android and bypass the SIM PIN?

I'm asking myself why it is not possible to start/boot Android without entering the PIN for the SIM card.
The smartphone is a computer, with it's own authorization mechanism (device pin, finger print, ...) that I could easily use without access to the SIM and therefore the mobile network. (It is not about the screen lock pin).

Why does Android not allow to start without this SIM card PIN and later enter the PIN?
(E.g when I looked it up in my password manager in the phone)?

I'm using a Google Pixel 4a - Android 13 (not rooted).
I've not found a way in the settings about this.
Is there any way (removing the SIM is not a real solution)?

To add more context / explenation:

  • The smartphone is protected with the device PIN (or finger print, ...). This is required on "login" after a reboot or to remove the screen lock.
  • The SIM card is protected with the SIM PIN. This pin is required when the SIM functions are accessed - usually the smartphone keeps its authenticated access to the SIM functions once accessed for the first time as long as it is running. (This is not a permanent unlocking of the SIM, I don't know if this is even possible)
  • The problem is that on startup/boot of Android is accessing the SIM card forcing to enter the SIM PIN. This can not be skipped. This shall not be needed, as the Smartphone would work fine without the SIM as well (e.g. if physically removed).
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    Check with your carrier on how to unlock the SIM... If your SIM is unlocked you don't need to enter the SIM PIN again//SIM check is not mandatory as far as Android is concerned
    – beeshyams
    Commented Apr 6 at 12:48
  • The question is good, but I fear you won't get an answer because why Android does not allow to skip SIM PIN entering is most likely only know to the developer who coded it in the beginning. My guess is the behavior was talken over from the cellular phones of the pre-smartphone era without thinking it over.
    – Robert
    Commented Apr 6 at 15:11
  • @Robert I am surprised. I've been using the same SIM for about 20 years, when smartphones weren't around and I never had to enter the SIM PIN//At least twice I had to change the physical SIM due to damage while retaining the number, yet never entered the code//Haven't seen anybody needing to do that either (work or family)... Hence my comment
    – beeshyams
    Commented Apr 6 at 15:23
  • @beeshyams: I'm not sure if I do understand - but if the SIM gets unlocked like that, this looks just like a security issue (consider loosing it). Might be a solution to the question I have, but one that should not be considered form my point of view.
    – PaulEdison
    Commented Apr 6 at 18:39
  • It may be a silly question. We are talking about the SIM pin and not the Phone lock Pin? Commented Apr 6 at 19:40

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