I can't play my tv sound on my phone(Samsung a30). It always says "your
Samsung tv 5 series  is already connected to another device" but no
device is connected to my tv. I even tried to reset my tv but that
didn't work. My tv model is UA43N5470AU...
No need to worry. this rumour started after Google playstore blocked
installing briefing app. I think briefing app modifying our phones root
folder so play store blocked. It's just technical fault. for safety
don't update briefing app. that's it.