Login to phone web portal, then go to Settings > Configuration page.
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2. Find Module Log Level and Local Log Level option, and set it as 6, then press Confirm
3. Find Export All Diagnostic Files option and Audio Diagnostic, press the Start button
4. Reproduce the phone issue you met
5. After the issue reproduced, press the Stop button
6. Press the Export button to export the diagnostic file.
Please export it immediately after testing, just in case of the file being overwritten.