Android 4.0 does not have native .mkv support like TW devices. It has the ability to hardware decode because the OMAP4460 chipset can decode it but after the update to 4.0.2 divx support was removed for some reason.
Optimized Mobile Hotspot when used with VPN.
Optimized 3G/4G data sessions for faster response times.
Fixed an incorrect notification that “data was disconnected due to roaming”.
Wi-Fi now automatically reconnects when returning to a known Access Point.
Improvements to special visual effects feature when using front-facing camcorder.
Visual improvements to the lock screen.
Email & messaging
Fixed an issue where some email attachments would not open correctly.
Apps & Widgets
DivX support has been removed, and will be supported in a future upgrade.
Improved audio volume in Google navigation turn-by-turn directions.
N1 to SGS2 to SGN to HOX T3 to G1 Dev ed. grey Lumia 920 to yellow 920 back to N1 then a Sony Xperia Z via a Mozart and now a black and a silver M7 and now a Nexus 4 and a HD2 running WP7.8 and then a Note 3 back to a silver 64gb HTC One M7.