Yet another update is now listed on Nokia’s servers via Navifirm. This time it is the PR1_1_V3 update which should be the Lumia 920 update that was detailed yesterday. The update looks to be focused around the phones camera (especially daylight photography) but it is assumed that it may pack a bit more.
We’re uncertain at this point if this includes the ‘Portico’ OS update as well, which is a separate function from upgrading the firmware to version 1249 (current one is 1242).
If you are thinking of doing this update yourself, we would strongly advice you to wait, as we don’t know the status of the version on the server. What’s more, you will hard-reset the device and wipe it clean, potentially losing any “saved game” states and other personalization. Only the official “over the air” update will preserve this info and be a true update instead of a device flash.Source: wpcentral