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Android 10 V25 mic problem on call

Star I
Please tell us some basic information before asking for help:
Model Name: ZE620KL
Firmware Version: V17.0615.2005.25
Rooted or not: not
Frequency of Occurrence: when on call
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.
when i'm on call people always told me that they are hearing me badly ; this occure also before i upgraded to android 10. But when i switched to loud speaker i have no problem

Community Legend II
Thank you for your asking. Kindly provide the information below so that we could better assist you.
1. What kind of calling app has this issue? Original Call app or the installed 3rd party app?
2. Do you face the same issue with earphones or just normal calling?
3. Please Please try to enter "Safe Mode". If the function works well in Safe Mode yet the issue remains out of Safe Mode, please check on any disturbance from the installed 3rd party apps.
# How to enter and exit "Safe Mode"

Star I
hi ,
thx for the quick reply.
i'm using the original call app
i have no problem with earphones
Same problem on Safe mode

Rising Star I
I faced same issue. Use stock call application.
So I downgrade to Android Pie, and it is fine now.

Community Legend II
Hi friends
Thank you all for your reply. I just tested my device with the same firmware version this afternoon, yet I didn't encounter the same situation. Have you used the phone case with your phone? If you have, after remove the phone case and any barrier from the 2 mics (top and button), does the issue remain the same?
Also, could you try "the Factory Reset"? Settings>System>Reset options>Erase all data(factory reset)
Please note that once the Factory Reset is completed, all data, apps, settings and personal information will be deleted.

If the situation remain the same after the Factory Reset, please let me know. Thank you.