I'm working on an app that has a code authentication, in order to do that I have to know what device has activated the code. Is there a unique ID or something like that, that does not change even if the app gets reinstalled?
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You can get this answer from below linke. [enter link description here](https://stackoverflow.com/questions/21795707/how-to-get-unchanged-device-id-from-ios7-device-programmatically) – shivlal kumavat Mar 17 '18 at 08:29
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From what link? – Sebastiano Taddei Mar 17 '18 at 08:32
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UDID is unique for each device. – Uday Babariya Mar 17 '18 at 08:42
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Ok i found the post from 6 years ago, but do you know how to use it? because it is not working for me – Sebastiano Taddei Mar 17 '18 at 09:05
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You can use the new [DeviceCheck](https://developer.apple.com/documentation/devicecheck) API but it is iOS 11 only – Paulw11 Mar 17 '18 at 09:31
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You can use the identifierforvendor for this
UIDevice.current.identifierForVendor!.uuidString
stevenpcurtis
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