Hi, when I call via voLTE or voWiFi and someone picks up, the call sounds good, but after a while it starts to sound very bad. When I answer (even one word), it's ok again (listening to the interlocutor) for a while, and then the same... I barely can understand words. Other users with ZF8 has same issues. voLTE and voWiFi - the same issue. The signal is full... T-Mobile PL, and WiFi 600Mb/s. I'm on latest release *.89
I can confirm all of this. What can I add: it happens no matter what version of Android we use (I even downgraded to Andoid 11 with clean image) it happens when both phones using VoLTE - when my interlocutor uses 3G everythings works fine, despite im connecting using LTE, so that doesn't look like connection problem it hapens also on VoWiFi it happens only to Zenfone 8 - i know people with Realme and Samsung in the same carrier - their VoLTE works perfectly I think it's problem with some codec support on Zenfone 8. T-Mobile (and 3 of 4 big carriers in Poland) uses EVS SWB in VoLTE, while classic HD Voice in 3G calls uses AMR-WB. I checked on this site: WiFi Calling, VoLTE i EVS w Polsce (wificalling-volte.pl), there is Rog Phone 5 on supporting EVS list, but no Zenfone 8.