[sudosysgen]

It isn't true. Android and iOS now use MAC address randomization by default, so your MAC address is almost assuredly random, dynamic, and not hardcoded. They typically even change between networks.

This is true of almost all PC network cards nowadays, and you should be able to turn this on easily.

[lxgr]

On iOS there isn't even an API to get the MAC address (or any other persistent identifier for that matter).