You don't reset phone after update. If you do it resets to software that is installed to phone when you purchased it. If you want just do only reboot to phone.
You have to install update again i think.
i don't think so, when you do a hard reset it will be the same version of the firmware not an older one, sure then there would have to be to os's on the phone lol!! you only see amber logo in the extras and info app, did you look there ???
i am using lumia 820 and i updated my phone to amber software .. after updating the phone i reset the phone and lost nokia glance , call filters and many more other things .. plz help