As we’ve previously mentioned, the Nokia Lumia 800 is getting a software update in certain regions. From the official Nokia forums we find out that the update refers to devices in India and Singapore and contains the 1600.2487.8107.12070 refresh.
It brings essential improvements: enhanced battery standby and talk time performance, battery capacity icon instead of question mark on top right of screen, improved bass in audio performance, soft-key illumination at all brightness levels, fixes for device performance issues including self-reboots, freezes and call-ending.
As far as the Lumia 710 is concerned, the 1600.3015.8107.12070 update is rolling out in India and Singapore, bringing: smoother device performance (when ending a call) as well as other minor performance and usability improvements.
If you want to read more details as well as feedback, follow the source links below to get to the official Nokia forum thread regarding the refreshes.