Android 8.0 XA1 plus & Android 9.0 XZ1. Android 8.0 system 9.8Gb & Android 9.0 system 7.4Gb. During the operation of XA1 & XZ1, it was revealed: Android 9.0 does not work well, it hangs, it's buggy, there are a lot of bugs. Android 9.0 is a stripped down system from Android 8.0. Android 9.0 there are no new changes to improve the performance of the system, Android 9.0 is a hoax from Google. Please provide us with a normal system, more stable and serviceable.