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I want unique identifier string for iPhone devices instead of UDID and MAC.
1. Get UDID and MAC are deprecated by apple.
2. We can use UUID but it will get change after reinstalling app or delete app.
I want any unique value of device which is remain same after app reinstall OR delete OR upgrade iOS version.
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Most mobile devices have a unique ID, also called a Universal Unique Identifier (UUID), assigned at the time of manufacture for identification purposes. For example, iOS devices are assigned what's called a Unique Device Identifier (UDID).
Every Apple iPhone, iPod touch and iPad has a unique device ID number associated with it, known as a Unique Device ID (UDID). Apple's device ID is a 40-digit sequence of letters and numbers. Customers can access their device ID numbers in iTunes or by downloading a free app from the Apple App Store.
What you can do is get a unique identifier using [[UIDevice currentDevice] identifierForVendor]or any other unique identifier generator. After that, you should store that value on keychain using KeychainItemWrapper and use. Once you store a value on the keychain it'll not remove even after you delete and reinstall the app.
Here is a guide for keychain access - Link
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