I found a test build of Android 5 for the k21 and s21 models that seems to work pretty well. There are a few things that don't work perfectly right now, but I've got Android 5.0. Does anyone know of any other 5.0 or 6.0 builds for our slate?
Please note this this does not include any HP specific software features and will likely void your HP warranty if it is still in effect. Since HP stopped making Android updates for the 2100 it is nice to have some way to get a newer OS.