This is Vivo Y20i official firmware update that you can easily install on your phone via SDcard. In essence, you don’t need a PC to install this firmware.
If you have previously rooted your phone or modified the system software in anyway you shouldn’t use this update package. It will soft-brick your phone.
All important data on the phone (like contacts, messages, app data, etc) should be backed up to avoid data loss. Although this update does not affect existing data on your phone; it is advised that you erase all existing data on your phone via recovery before you update, to ensure a clean and fresh installation. So, it is reasonable to say that you backup important data in case something goes wrong or so you can use them later.Download !!!