In fact, there are no privacy rights when issuing a phone identifier, and, as already noted, you need to provide it in order to be able to run test builds on your phone.
I would say that if you want to hire someone to develop an application for you, you probably trust them enough to give them what they ask for, because you will run the application on your phone from them, which did not go through which Either the approval process (although the sandbox helps a lot there, since there is not much harm that they can do).
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