You can't use iMessage without authenticating, and Apple didn't provide a way for Android devices to authenticate. Beeper Mini, while it may be using the APIs t

You can't use iMessage without authenticating, and Apple didn't provide a way for Android devices to authenticate. Beeper Mini, while it may be using the APIs through a questionably obtained binary, is handling authentication for you so a non-approved device can become authorized to send/receive iMessage data. A non-authorized device is gaining access to an authorization-required service in a way the service provider is not happy about. If it isn't technically unlocking something Apple doesn't want unlocked, it's realistically gaining access to a restricted service. Just because I can make a key that unlocks my neighbors door doesn't mean I have the right to use it without his permission.