Back in December 2018 we reported that the Asus Zenfone Max Pro M1 will be getting Android Pie by February. And Asus has provided Pie on the last day of February i.e on 28th. However the update isn’t stable, it’s beta. You have to apply to become a beta tester, for this you need your serial number and IMEI number which you can found either on settings or in the box.
The steps are quite easy for enrolling as beta tester. Just provide your basic details such as name, e-mail address, phone number and so on. Once you fill the details, they will confirm the same and then you can download Pie. However they will be some bugs as this is a beta, but it would be fixed soon!
By clicking here you can apply for the same. Also Asus had released a list of devices which would be getting pie through it’s official forum i.e Zentalk. Here is a quick view of the list. Check whether your device is eligible or not. Max Pro M1 user’s please let me know whether you have updated to Pie or not. If yes, please let me know in the comments.Source