You can do the following:

1. 🔧 Reset and re-pair the headset
- Sony recommends the following for sound problems: "Reset + Re-pair"
- Press and hold both earbuds for 10 seconds → Delete pairing.
- Then pair again with the smartphone.

2. 🎚️ Deactivate "Speak-to-Chat" and adaptive noise control
- Open the Sony Headphones Connect app
- Deactivate:
"Speak-to-Chat"
"Adaptive noise control"
"Optimisation on movement"

3. 🌀 Activate wind noise reduction
- In the app: → "Sound" > "Wind noise reduction" → ON

This switches off the external microphones in a more targeted manner.

4. 📶 Set the Bluetooth codec to "Priority on Connection Quality"
- In the app under "Bluetooth connection" → Prioritise connection quality
- Not: "Prioritise on sound quality" - this leads to instability during phone calls.

5. 📲 Try with only one earbud
- Use only one (e.g. on the right) - Sony then prioritises a single microphone with "Beamforming".

6. 🔄 Update the firmware
- The latest version (e.g. 2.0.2 or higher, version 2024/2025) improves microphone logic during phone calls.
- Check in the Sony Headphones app under "System" > "Firmware".