The device does not have a clock inside, it relies on the time it gets from the internet. With the latest firmware (2016-01-26) there is a very annoying bug: from the Android settings we enabled time from the internet and set the proper timezone, this settings works just once, after a reboot the time is almost always unset.
Mxq Firmware Update
If the device does not have its su binary installed, you have to boot in TWRP recovery mode and install superuser from a zip file. You need an update .zip archive, not the .apk Android package, this is why the SuperSU app is distributed also as a zip file (see below for download link). Save it into an SD card along with the TWRP recovery, boot from it and install.
Like others Android devices, this one too can boot into Recovery Mode. This is a minimal operating system where it is possible to delete all or some user data and files, perform system updates, etc.
To enter the recovery mode follow the toothpick method. It should be possible to sart the built-in (stock) recovery, or pick one from the SD card. My device with firmware 2016-01-26 is unable to start from the built-in, it just keep on rebooting, so it definitely needed one on the SD card.
Once booted into TWRP, you can click the Backup button and save the images of installed firmware. The archives will be stored into the internal storage of the MXQ, under the directory /storage/sdcard0/TWRP/mxq/ (really a link into /mnt/shell/emulated mounting point). In my case it required 1.5 Gb, where the free space was about 3.9 Gb. The saved images are (see below for info about their content):
Flashing a different firmware can be useful to upgrade or downgrade the stock software, or to flash a totally different image, e.g. OpenELEC or LibreELEC (we need a version specifically built for our hardware/model).
Some posts tell to flash a new firmware using a Windows PC and the AMLogic USB Burning Tool, while the MXQ device is connected via an OTG USB cable. We don't have a Windows PC and our MXQ box does not have the OTG USB socket, so we definitely go with the alternative SD card method.
The update zip file is actualy a JAR archive, it can be extracted using jar xvf file.zip. Into the root directory of this archive there is the /system directory and there are also the images to flash into the relative partitions. This is an example:
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