After installing this update you can´t install many custom roms (Boot loop) but you have to downgrade first to s110
This is the latest Original Firmware from Lenovo with some performance enhancement and new boot logo with Powered by Android but still Android 4.2.2
Or just watch this video
Note: This zip file is not to install using Recovery/TWRP but only using PC and SP Flash Tool (make Backup before install, because updating will Factory Reset your Phone)
