Sprint has indicated that it’s preparing to launch HD Voice service. Till the end of this year, the requirements for HTC Evo 4 G LTE are that the equipments must support voice HT and local network where the equipment’s owners connects to be upgraded and modernized with Vision Network. HD voice improves a lot the experience of talking on mobile phones. Sprint afirmed it will be released in limited edition this year and it will rise well before the end of 2013. The company says it is needed an upgrade to a critical mass of phones, plus improvements required at the network that can support HD Voice. Besides, Sprint needs to take different equipment than Evo HTC 4G LTE phone market. They explains that HD Voice technology will increase at the end of 2013 and in 2014, where significant growth is expected at the network and mobile phone that supports HD Voice by the end of 2014.