Yesterday, we reported on how personal data can remain on an iPhone even after a reset and restore. An officer in Oregon was able to retrieve private information from a refurbished unit. Today, we've got a possible workaround to help iPhone owners keep their data safe when it's time to move on to a new smartphone. Securosis has posted instructions to - in their words - "minimize the chances" of data recovery from an iPhone.

In short, the process leverages large-sized playlists that, when combined, take up all the storage on an iPhone to overwrite all the data (personal and otherwise) on the device. See Securosis for the full instructions on how to perform this hack.

It's worth a try if you're getting ready to auction off that old iPhone model in preparation for a new 3G edition, when they're finally introduced. The latest rumor has Apple launching the new iPhone and the iPhone 2.0 firmware upgrade with the AppStore and everything on June 9th, during its upcoming World Wide Developer Conference.

[via tuaw]