Hi giuseppe77,
Thanks for your inquiry.
1.
Do you mean your phone battery consume soon when standby or in use?
I would suggest you let the battery charge more than 30 minutes even the battery percentage shows 100 then remove the cable before going sleep. Please show me 2 screenshots as below on next morning before you use the phone.
2
Some apps that automatically start in the background may occupy memory, cause system lag, and drain battery. Please try to use the mobile manager to helps free more memory, improve system performance, and save power.
https://www.asus.com/zentalk/thread-9493-1-1.html
https://www.asus.com/zentalk/thread-33286-1-1.html
3
Does this problem appear even you in a different location?
Could you show me your screenshots as below when you encounter this problem?
(1.) Signal weak screenshot
(2.) SIM status screen: settings> system > about phone> status> SIM status
4
Could you kindly tell me more about this matter? Do you mean notification volume or else?
Thank you. 🙂