If you're an impatient type and can't wait for the Amber update to hit your Nokia Lumia 820 and Nokia Lumia 920, unofficial ROMs of the update have leaked for both Nokia Lumia models; keep in mind that there are plenty of risks involved, especially since you will need to wipe all data off of your phone. And once you do install the ROM, there is a good chance that you will miss out on the official update when it does roll out...Source: http://www.phonearena.com/news/Unofficial-Amber-ROMs-leak-for-two-Nokia-Lumia-models_id46078
