do you mean there is a known upcoming change in signal?

exFAT then

to be fair, this is not “asking for permission”. that’s what xiaomi is doing, but not this. on xiaomi phones, to be able to unlock the bootloader or grant higher permissions to adb, you have to insert a live sim card, log in with an “mi account”, and have the server decide whether you are allowed doing that. for unlocking you additionally have to wait for several days, if you can get the approval process started that is, and hopefully you will be allowed.

unless it turns out this requires internet connection, a sim card, or a google account, this is just a safety procedure. and it’s hard to say but this world is so full of incredibly dumb people that all both need and want to use shiny smartphones for all that convenience and social media addiction, that a safeguard like this is needed.

but kids are not 100% of the time in our sight.

neither is your age verified phone. kids are already stealing parents credit cards to spend on mobile games, this will just add another incentive. but I bet your next idea will be constant age verification with the front camera.

but when they see us coming they switch apps - who knows what they are doing

and how the fuck does this help with that? your issue is that you are fucking lazy to even enable the built in parental control functions in the phone!!!