How to write to registry of iPhone from unity3D

Hi there, is there a way to write to the registry of iPhone like in windows. The main reason for this is, i want my data to be saved even if the app is deleted from iPhone. So it need not be registry too, i just want a place from where i can retrive the data on re installation. Please help me on this, thank you.

General standard in iOS to using either archiving or coredata however you can also use sqllite .,You can do it multiple ways not sure which one is supported by unity but the general standard in iOS is to use archiving or coredata or sqllite <this db can be used with C# as its only a container>.