I am working on in app purchase app and in my in app purchase i am posting users device ValidationID for my own information (UDID is deprecated from IOS6 so validation id). But in some case validationID retuns 00000.0000.000000 ( when you update your ipad or iphone from 5.1 to 6.1 direct) at that time ios having this issue.In this question
I am using these id to have log store in my server but in this case every-time device returns 00000 So which ID should i use int this case?? any help is appreciated