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Is deviceUniqueIdentifier actually unique?
I've read many threads and posts in which people have problems using deviceUniqueIdentifier, either it changes if device it switched between wifi and mobile data and/or other reasons. But almost all of those posts are from 2011-2013. Is it safe to say that deviceUniqueIdentifier is actually unique per device in 2016?
I'd like to use it as a user - device identifier (key) in database for non authenticated users (play store and gamecenter), if it can change for whatever reason, it's unacceptable and cannot be used, thanks.
edit: My target devices are ios and android smartphones.
It would help if you referenced the many threads and posts you're referring to - the documentation page you linked to says "guaranteed to be unique for every device" so, if there's evidence that's not the case you should report it as a bug.
Did you ever get an answer for this? I'm in the same situation and reading old posts saying it is not reliable. Did you end up using it?
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