Android is a general purpose embedded OS, it's not just used on devices with cell radios. It doesn't manage the BP (cell phone processor) either afaik. For exa

Android is a general purpose embedded OS, it's not just used on devices with cell radios. It doesn't manage the BP (cell phone processor) either afaik. For example, a voip android desk phone - it relies on voip to make calls. Android is agnostic about it and allows third party software to handle underlying calls, whether it is Qualcomm/Samsung/etc software for cell calls or Microsoft Teams for VOIP. There isn't a straightforward approach here for Android. It's not like iOS where Apple owns the entire software stack, including modem software.