I would like to revert back to using 2.1.3 to avoid a reboot problem I’m seeing, but it doesn’t appear that I can get past the initial setup screen. Its forcing me to update the software to 2.2.2, which has the bug I’m trying to avoid.
The only way to do it is to interrupt internet access on the wi-fi hotspot before clicking update. The update will fail and you will be offered to skip it.