Just tap on Download to start downloading an update. These are exactly the same files as the OTA
updates your phone usually downloads, so they are safe to use.
There is a detailed installation guiide on how to install a system update. Installing takes place in the Recovery
environment of your device, but is easy, safe, and does not delete any of your data.
View system information about your device. See what chipset you have, how many internal memory
your device has and which Android version you are currently running.