I'm looking for the way to restore my data quickly without connecting to internet,,this way could be a effective solution,,but I'M worry about its reboot would confict to my android 2.2 mutiboot menu~~ could you find an solution for me?~~thanks.
I vote PIN, as in numerical entry. I also vote for arrow/grid input, however, like you said, the implementation is harder to do so regular key input would be suffice as well.