Discord and Ts3 quality on the phone sounds like normal phone calls over the net?

If I use DC or TS3 on the phone, the audio quality on the entire phone is as bad as if you were talking on the phone. So suppressed rush, very stump. Every sound that is emitted by the mobile phone sounds like this. I have a Huawei mate 10 lite. Why is that, can you fix it?

So that can

1. Lying on your phone's microphone, I do not know how good yours is now.

2. Lying on your internet from your phone. That means if you now z.b. In the attic so far away from the wireless router and the phone has very poor Wi-Fi reception, that's probably because.

My microphone is quite normal. For all other apps, it sounds normal and my inernet is good too.