I have few problems:
1. My headphones are connected to my computer, when I'm hearing spotify\youtube\anything else I'm hearing only this and couldn't here something else at the same time.
For example: whatsapp web voice message and youtube.
I tried to do a conference in zoom, and then play youtube, and the zoom got quit. When I paused the youtube video, zoom returned.
2. When my headphones are connected to both my computer and smartphone I can here only one of them at the same time.
Thanks for posting. Welcome to the Community.
The QC35 II, like other Bluetooth-based headphones, uses different Bluetooth profiles to communicate audio transmission. Music uses A2DP, whereas notifications, voice recordings, audio calls, etc use HSP or HFP. It is not possible to have both profiles playing simultaneously.
I hope this helps.
Thanks for reaching back out to us @sys22,
The profiles being referred too are Bluetooth profiles, which can't be active at the same time. For example, you are only able to use one source of audio at a time you won't be able to stream music via Spotify while taking Whatsapp calls as the audio will be prioritized and play the source you began to stream last.
If you have any further questions, please do let us know.