Firmware Version: Android ICS 4.0.4
Release date: 07.09.2012
Build number: Mele HTPC Wed Jan 16 11:51:28 CST 2013 Version 1.3.1
So, earlier today I post an article about 'Mele Smart TV Box 4.0 V1.2 custom firmware installed on Rikomagic MK802II'. Now I managed to find Mele Smart TV Box 4.0 V1.3.1 firmware, and this custom firmware can be downloaded from here or from here. The method is the same, burn the firmware with PhoenixCard Tool on your micro SD card, insert it in your MK802II stick, power on and wait 4-5 minute. In fact, you can learn from this video tutorial how to do it exactly.
This firmware version has root access, and it is especially made for chinese market, I guess, considering the launcher and some chinese apps. This is the first firmware I see with animation during firmware upgrade from SD card (a green line). It also has a Mele custom boot animation, the wifi connection and Play Store work just fine.
Always keep in mind that this is not a review, just a first sight of this firmware. You have to test it more for another details, to see if it satisfies your needs.