The provider can't, I setup 2FA on that number, which essentialy means nobody
is going to reuse this number, but this is not the concern either, I just need to transfer
it to a new phone, and the number was registered in a country with an anonymous SIM,
and after 2 years there is no way to reactivate this number without going to that specific
country, where I believe I can "receive" any number for merely a few dollars at any corner shop.
Well, I guess I will just have to keep the old phone even way after GOS stops releasing any updates.