I have two tablets. An Ainol Novo7 Aurora II (7") and a Lenovo A101 (10"). They both came from China without standard ROMs, and as such, the ROMs are not automatically (or manually) updated with system updates.
The Ainol has a Android 4.0.4 platform that does not look after the battery very well, as well as other shortcomings, and the Lenovo A101 has a Android 4.4.2 which is not too bad but I understand upgrades do have better all-round performance.
The A101 is not a standard Lenovo tablet, the name doesn't appear on their radar at all, and the Ainol seems to be fairly non-existent as far as support goes.
My question relates to the capabilities of these tablets to be upgraded (to the highest platform level available for each), and whether there is a simple process available that can be used, similar to upgrades in the Windows systems, without requiring the need to dig into the firmware components and the saving elsewhere (temporarily)of various levels of data?