The firmware update is to resolve “GPS Week Number Rollover” Issue. This issue only affects models sold during years between 2010-2015 (which are using the MTK3329 chipset). The current models sold after 2015 (which are using the MTK3339 chipset) don’t affected by this issue. No update is needed.
Download firmware update for V-900 and V-990;
Download firmware update for V-800+.