In yesterday’s launch of Apple’s iPhone 6 and iPhone 6 Plus, the company announced support for Voice over LTE (VoLTE) with the new hardware. Apple’s comparison chart between the 5 and 6 families indicates only the new phones will support VoLTE, so prepare to open your wallet.
With three out of four (AT&T, T-Mobile, Verizon by end of year) offering VoLTE, Apple had to offer VoLTE at some point in time. Various Android models have supported VoLTE for over a year while Microsoft added it into the Windows Phone 8.1 Update 1 released over the summer.
The iPhone 5s and 5c support HD voice on HSPA networks with the service, so there are plenty of iPhones already making HD voice calls. Sprint quietly rolled out support for its Qualcomm-specific version of HD voice on the iPhone 5s/5c over the summer.
For current iPhone 5s/5c owners, there’s a possibility that a “Jailbreak” version of iOS could support VoLTE on their hardware. Earlier jailbreaks have provided HD voice support to the iPhone 4s and 5 on HSPA networks.