Hello @
@Kris_ASUS , thank you for you reply
Update yesterday my phone to the last firmware and for now i think the notifications of whatsapp used with twinapps is solved.
But call sound remains very very bad! A simple pone of 30 USD have better sound in call then ZENFONE 6, is a issue Assus need fix because the phone is great but a call is the main function of a obile phone!
Another bug i see is the notifications of all all the other apps, like gmail, normal whatsapp, skpye etc.. is not immediately, takes some time (sometimes 30 seconds - 60 seconds) very strange, and if the phone is with display off (stand by) takes more time, do you know how i solve this issue? its a function to manage batery duration and only refresh data after long period?
This is not problem of the last firmware, even before update i have this issues too.
Thanks