Successfully updated it to Amber. BLACK Lumia
Steps(Taken from posts earlier)
I used both these steps.
Nokia Lumia 920 RED ONLY MY ROM (Amber update)
install at your own risks
http://www.mediafire.com/?289rqnb8ncy1n5x,...7rfacj193pgg1cr1. Install Nokia Care suite
2. Copy it to C:\ProgramData\Nokia\Packages\Products\rm-821
3. Open Nokia Care Suite and select RM-821
4. Programmer > Recovery ..it should prompt the latest ROM in the listust flash in recovery mode using NCS.
1. open ncs, login as external, work offline
2. turn off your phone.
3. open product in ncs RM-821
4. choose the firmware, click start, wait for error.
5. plug in the phone, then turn it on, it will boot in recovery.
5. retry in ncs, it will flash.
done.
Thanks GothFebrio and fantasy1989 !