iPhone/iPad unique identifier BESIDES UUID/UDID?

Question

The project I am on is requesting two (or even three) unique identifiers from the iPhone or iPad. I know, I know... the UDID should be enough but we are trying to see if th

Answer 1

You can get the ICCID and the IMSI (if they exist).

NSString *commcenter = @"/private/var/wireless/Library/Preferences/com.apple.commcenter.plist";
NSDictionary *dict = [NSDictionary dictionaryWithContentsOfFile:commcenter];
NSString *ICCID = [dict valueForKey:@"ICCID"];
NSString *IMSI = [dict valueForKey:@"IMSI"];

I think that's as far as you will get. I don't know any other options for getting an universal ID.

UPDATE 2013-03-13: This has probably changed since I wrote this answer almost two years ago. I don't even remember what was the iOS version at the moment. Also as @joshis correctly pointed out in the comments "You cannot legally do this, since your app would read stuff from outside the application sandbox and therefore, it will be rejected, as specified in AppStore Review Guidelines...".