After installing the most recent Battle.net Mobile Authenticator iPhone/iPod touch update (v1.1.0), all players will be prompted with a one-time warning that states:

Running a “jailbroken” iPhone OS device may compromise the security of the Battle.net Mobile Authenticator.

This warning message is being issued by Blizzard Entertainment as a reminder that running the Battle.net Mobile Authenticator on a “jailbroken” iPhone or iPod touch could potentially compromise the security of the Mobile Authenticator application. If your iPhone or iPod touch has not been “jailbroken” or modified to bypass software restrictions, please click “OK” and you will no longer receive the warning.

Please note that this message will appear on all iPhone & iPod touch devices and is not meant to indicate that your Apple device has been modified.