Thanks TheKit. I plan on doing that tomorrow, so just to make sure I got it right, (1) the flashing guide on the F(x)tec forum, (2) zypper refresh/zypper update, (3) kernel flash? In my case (1) alone should be enough since it will be a new installation, I can use the new image you posted.

Your comment about my three questions is encouraging. Sticky keys are very convenient on thumb keyboards since it's not easy to hold simultaneously multiple keys (could be a risk to drop the phone in some situations). Unlocking with keyboard opening or key press would be very useful too.