Hmm, ok its like this, so firmware updates come from the manufacturer (i.e. Nokia) while OS updates come from MS. FW updates are often released together with OS updates. Together, they both have to be reviewed by mobile operators (i.e EE) before being released. Developer GDR3 is a preview release of the OS update from MS. Nothing to do with the FW update. Simple explanation:
At release EE lumia 920: FW-1232.2110.1244.3011 ; OS: 8.0.9903.10
MS releases Portico (GDR1), Nokia updates FW for camera improvements: FW-1232.5957.1308.0020 ; OS: 8.0.10211.204
MS releases GDR2, Nokia updates FW for Amber: FW-3047.0000.1326.2021 ; OS: 8.0.10328.78
MS releases GDR3, FW-no change ; OS: 8.0.10512
in future, Nokia will release Bittersweet Shimmer enhancements then FW will change, since OS is already GDR3, no update to OS version.
as you can see, MS is trying to make OS updates independent from manufacturer's FW updates to ensure users get the latest OS ASAP. Hope that clears the confusion.
10-14-2013 11:30 AM