Over the course of 2014-2015, Lenovo pushed a few critical updates:
The official desktop utility for MediaTek processors. lenovo b8000-f android update
(the predecessor to LineageOS) to get a cleaner, more stock-like Android experience. Over the course of 2014-2015, Lenovo pushed a
Back up all personal data, as OTA packages can sometimes fail or force a data wipe. Step-by-Step Instructions Over the course of 2014-2015
If the OTA feature fails due to server unavailability or corrupted internal files, you can force the official update using a PC. Lenovo provides a dedicated desktop tool for this purpose.