Been using a 920 for last couple years and bought a 1020 as an upgrade. That being said I need Lumia Black and have done my research and do not wish to update to Cyan. Stock out of the box it's running Amber. Is it possible to still only update to Black. If I select yes to phone update am I going to be 8.1 when the phone boots after? Or does it do it one stage at a time?