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by tmzt 4601 days ago
"Airplane mode" is essentially and AT command sent to the baseband to disassociate and go to sleep, it doesn't disable the baseband CPU, DSP or anything else.

You could argue that "off" is the same thing, for instance, many Qualcomm devices boot with the BP first and and can do a lot before the AP is even taken out of halt, without initializing the LCD display, backlight, etc.