Please tell us some basic information before asking for help:
Model Name: zb601kl
Firmware Version: 0.56
Rooted or not: no
Frequency of Occurrence: n.a.
APP Name & APP Version (If your issue relates to the app): n.a.
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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1. Speaker
2. Camera 2api
3. Call recording
4. Native video call
5. Airtel WiFi calling
6. Battery & Performance