What does the HD symbol mean when you're making a phone call?

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Hi Chester. It's HD voice, it's a new standard for crystal clear voice calls that virtually eliminates background noise. HD Voice provides a fuller, more natural-sounding voice, plus noise cancelling technology that helps reduce background noise from places like a busy road, a crowded restaurant or a construction site. Noise cancellation also reduces the effect of extreme weather conditions like a windy day. (source)



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