We experienced uneven call quality with both the HTC One X and the One S, but the Evo sounded good on both ends of the line. My friends said my voice sounded clear and natural, and they didn't hear any crackling or static as they did on the One phones.

The EVO 4G LTE will be the first handset on a U.S. carrier with . Sprint's demo of HD Voice at the EVO 4G LTE's launch in New York City showed how it significantly decreases background noise.

This is made possible by the Snapdragon processor, which uses dual-microphone noise suppression and earpiece active noise cancellation. It also relies on Sprint to finish its upgrades to its 3G network so we were unfortunately unable to test this feature. Also, HD Voice will only work if both people on a call are using an HD Voice-supported smartphone on an HD Voice-supported network.

The Evo phones have always been Sprint's strongest offering, and the Evo 4G LTE is no exception. From its beautiful design to the versatile camera to the fast performance, this is Sprint's best phone--and one of the best Android phones available. But without LTE, it feels as if it is not quite living up to its potential.