If you have read our article about “Lumia 920 Global / AT&T firmware variants (RM 820, 821) and Lumia 820 global variant (RM 825) spotted on NaviFirm” then you may remember us disclosing for the first time that Lumia 920 for AT&T will bear “RM 820” model number. Now this has been confirmed by what looks like FCC filing for both AT&T bound Lumia 920 and 820. As deduced by us , Lumia 920 is indeed RM 820, while Lumia 820 for AT&T has the model number RM 824, which reconfirmed that RM 825 will be the global variant.

The filings reveal  700MHz LTE in AT&T’s range and AWS-based LTE for both AT&T as well as for Rogers Canada . The Lumia 820 limits the LTE access to AT&T’s network ?

German retailers and Carriers have already hinted a closer 1st November release date for device. Now, appearance at NaviFirm and FCC may also give push to the probable 4th Novemeber release date of the devices in USA.