Hi
lkasthuriranga,
Is your phone ZB601KL or ZB630KL? Please provide your firmware version: Settings > About phone > Build number.
1. Fast charging issue: Are you using the original charger? Please try with new cables and check again. The fast charging appears after a few minutes when you plug in your charger. Please check your lock screen after a few minutes. If the problem still appears, please tell us at which battery levels does fast charging not work.
2. Which part of the phone does it heat up? Does it appear after any specific actions? Please refer to this FAQ:
https://www.asus.com/support/FAQ/1011555/3.Could you provide more details on what kinds of Android 10 features?
4.Call recording is not supported on ZenFone Max Pro M1.
5.Split screen can be found on Android 10 ZB601KL. Please tap the recent app button>Tap the app icon>Split screen.
6.For the sound quality problem, what app/app version are you using? Do you have a music link you can provide as an example? Could you describe in more details or show us a short video on the sound quality problem? Thank you.