Call quality is not good

Please tell us some basic information before asking for help:
- Model Name:ROG 3
- Firmware Version:99
- Rooted or not: not rooted
- Frequency of Occurrence: always
- APP Name & APP Version (If your issue relates to the app):
In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.
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Call quality is not good.reciver not able to here properly.low sound and eco.very distrubing.
Also have black patch issue.
Please look into this matter.
1
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Same issue of call quality
@[email protected] @Aman89053 Can you do some light troubleshooting for me?
Jio and Vodafone carrier using
Same problem with whatsapp but better then normal calling.
Nothing happens with the Google dialer .
Using Jio carrier service.