We already show the numeric keypad on the mobile site. We don't want to use the phone keypad (which doesn't have a decimal point or comma) because some people do track their odometer to a decimal place.
lancea, this is a problem with recent versions of some Android phones. It seems to be limited to Samsung models so far. For some inexplicable reason, they decided that a decimal point wasn't necessary on the numeric keypad. It's very frustrating to be on this end—there's nothing we can do about it.