Years ago i had a conversation with Daniel about implementing the possibility to change the IMEI of the device. He is of course aware about the privacy impact a non changeable identifier as the IMEI has. But there is nothing we could do about this. Neither the hardware provides the possibility to do that nor the law allows it. With the exception Africa. This is the only continent where it is explicitly allowed.
We definitely need to investigate if it is regulated by law or any other agreements how airplane mode should behave. Because typing a number, while airplane mode is activated and connecting to a cell tower means the purpose of unlocking the phone is not a complete feature. Anyone could activate the baseband at the moment.