Dima Aryeh over at DroidDog has posted an excellent article concerning a bug with many Exynos-based Samsung phones (international I9100, Sprint D710, AT&T I777, Note N7000) that means they can be permanently bricked.
The vulnerable flash storage controller firmware means your phone can be bricked during a factory reset or when a recovery binary attempts to erase partitions when formatting them.
The article includes a full explanation of the problem, including a link to an apk that will test if your device is vulnerable. The app confirmed my S2 has the bug. As I’ve recently been considering flashing a custom rom on my phone, this article fills me with fear. I guess I have a lot of reading to do before taking the plunge.
Check out the full article here.