This is indeed a problem.
One possible solution is that you create the fictional account, and send it to the review team. Once they apply for registering with their own mail address, just detect this special case it in the server so that it will respond to the address sent by them instead of the one you generated in the fictional profile.
However, unless there is a specific reason why a registered user can only use his profile with a specific device, why don't you also add the option to login after the Privacy Statement? This would also solve the problem that will appear if a user changes his mobile device: should he expect to be able to login with a different device ?