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[ZE620KL] (A10beta V25) Earpiece's Sound Quality is Bad When Call Volume is more than 50%

Star III
Please tell us some basic information before asking for help:
Model Name: Zenfone 5 ZE620KL
Firmware Version: 17.0615.2005.25
Rooted or not: NOT
Frequency of Occurrence: Always Every Make A Call , Music
APP Name & APP Version (If your issue relates to the app): Phone, Whatsapp Call, Music,
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.
Hi, After updated to latest Beta (v25) the earpiece's sound quality is Bad when Call volume is set to 50%++
The earpiece's sound is too loud and broken (not clear)
this happened every make a Call (Phone , Whatsapp Voice Call , etc) When "Call Volume" is 50%++
this also happened when play a music when "Media Volume" is 90%++
i attach the video:


Community Legend II
Hi aerialus
Thank you for your asking. Kindly provide the information below so that we could better assist you.
1. If you roll back to Android 9 or previous version, does the issue remain the same?
2. Have the device ever been fallen before?
Also, I have test my ZE620KL with the same firmware version, earpiece and loud speaker with 50% below and beyond, yet I didn't encounter the same issue.