The unit RQ0278 had been tested without any problem before sending out.
When you make or receive a call, please use both the smartphone spkeaker side and our unit mic side.
Sometime the sound seems weak when you don't put the external mic directly in the front of you, and the surrounding noise also bring the interference during a phone call.
RegardsStatistics: Posted by Jammy — Mon Feb 20, 2017 10:51 am
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