Low voice quality after 5 minutes of call

[Smikee]

Hello there,

I'm having issues with my Zenfone 9, not rooted, build number WW_33.0804.2060.100, Android 13.

I'm constantly receiving complaints about my voice quality during the call. It usually happens after a certain time period from the beginning of the call, like 5 minutes. People say that my voice has echo and I sound like a robot. If I end the call and start over it's fixed, but in a couple minutes it's worse again. I didn't have such problem with the same SIM (Vodafone Czechia) on other device, making a call from the same place (city center with very strong signal in general), so I think that my Zenfone 9 has a bug. I found similar complaints but no recommendation, I really don't plan using an external microphone or something with the device for 700 Euro.

Asus, please fix this.

[gargamel314]

I've had this happen too. this persisted into 2060.113 also. I've found that toggling speakerphone on/off will sometimes fix it temporarily.

[ambrat]

Is there any progress on this bug/issue? It also happened to me a couple of times since the last update

@Mansi_ASUS 

[SmOg]

This is simply AWFUL, ASUS should fix this as a maximum priority. Getting constant complaints, that my voice is robotic, unable to hear me etc. 

- Tried a different Phone app, but it doesn't fix it
- Tried both SIM with both different services - STILL BAD
- Tried to disable 5G - STILL BAD
- Tried to enable/disable VOLTE - STILL BAD

ASUS FIX this as soon as possible because this phone's CORE function DOESN'T WORK!!!!
Not to mention, that this issue has been a long-time known one, and still no fix has been applied. I am starting to think this is a HW issue, which is shameful!

PS: latest FW version: 33.0804.2060.113

[SmOg]

Update related to this issue:

SIM ONE SLOT (Tmobile) can use 4G/5G so I assume that can cause an overall better voice quality.

SIM 2 slot uses a different carrier (Vodafone). I think this SIM slot management has a software issue/bug. 

1. If I select ALLOW 4G/5G network only - the signal instantly drops to ZERO and nothing I can do
2. If I select ALLOW 4G only - NO signal too...
3. If I select ALLOW 2G/3G/4G/5G - the signal comes back and stays in 4G+ (WTF?)
   1. How can I connect to 4G only when I allow 2G/3G? 

The thing is I try to force to stay at 4G at least so at least I can test if this causes the poor voice quality. 

[ZenBot]

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