At the time of release Asus Zenfone Max Pro M1 was an excellent smartphone, which is based on a single-crystal system Snadpragon 636 and is equipped with up to 6 GB of RAM, as well as a large battery capacity of 5000 mAh.
Despite the fact that at the time of release he was working under the Android 8.0 Oreo, he received an update to Android 9, and the last few months is the official testing of firmware based on Android 10 for this smartphone.
Meanwhile, the participants of the forum XDADevelopers have already ported Android 11 to the Zenfone Max Pro M1, but it is worth understanding that this is unofficial firmware, which has some bugs. Install this firmware is only for experienced users.
With this firmware smartphone works almost fully, it can make and receive calls and compasses. Work Wi-Fi, Bluetooth, camera, sound, sensors, flash, GPS and other functions. No information about specific errors yet.