I started playing around with a Lumia 530 on T-Mobile which has HD Voice and the call quality is night and day compared to my Nexus 4.  Everyone I&#x27;ve talked to says the calls sound dramatically better and I&#x27;m not aware of anyone who has HD Voice capable phones.  The noise cancelling seems to be a big thing as most people tell me that they can&#x27;t tell I&#x27;m driving when I have them on speaker phone.<p>I didn&#x27;t realize it had HD Voice and chalked it up to Nokia just knowing how to make a decent handset.