Upgraded to beta 3 (.429) from beta 2(.424) simply by downloading the file from Indian Asus website and pasted in the internal storage directly and restarted the phone, got the pop up to update the phone.Yes, there are some bugs, but as per my beta 2...
vishalsr098https://zentalk.asus.com/en/discussion/31412/asus-zenfone-max-pro-m1-android-10-beta-2-vs-beta-3Beta 3 is better than beta 2. But you can't upgrade directly to beta 3 from beta 2, firstly you have to downgrade to .063 or .407 firmware then...