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I made a phone call the other day on my friend's Lumia 920, calling another Lumia 920, both on the T-Mobile USA network. The clarity of my other friend's voice on the phone call was quite impressive.

I could buy a 920 of my own from T-Mobile, but alternatively, I'm also considering whether a Lumia 1020 would be worth having. Unfortunately, T-Mobile itself does not sell 1020s. I would have to buy one from another retailer and use it on the T-Mobile network.

The HD Voice question is a critical factor in deciding whether to buy a 1020. Would HD Voice would work on the unlocked 1020?

  • Perhaps this is really a question about T-Mobile, not Windows Phone. – Jacob Feb 7 '14 at 23:13
  • It should but I can't verify it. The Lumia 1020 support HD Voice (it's an extra voice codec most phones support) and as long as you have the correct T-Mobile settings. – Neil Turner Feb 9 '14 at 14:00
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All Nokia Lumia (probably all Windows Phone devices too) support HD Voice.

HD Voice is a standard so yes it would work on your unlocked phone.

  • 1
    My current phone, Lumia 710 (WP 7.5) does not support HD Voice. Perhaps all WP 8 phones support it, but this older one does not. – Jacob Jun 2 '14 at 2:28

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