So I've finally decided to root my i9100 and have a few questions. I have: 1. successfully flashed Siyah kernel - is it true that this automatically backs up efs? 2. lost ability to update apps on my external SD card. - Any suggestions to fix that? 3. I also tried to go for the Biftor ROM (v.10) but it wouldn't boot past the animation screen. - any suggestions for that? Before rooting, the phone would occasionally reboot itself (usually cause by a bulky game app). It seems to be doing it more now. - again, any suggestions for that? Sorry, a few questions in one post, but figured it may be better to pool them. Cheers.