With the introduction of the Verizon iPhone in January 2011, the issue of using the internet while on the phone was brought to the public's attention. Under the two U.S. carriers, internet and phone could be used simultaneously on AT&T networks, whereas Verizon networks only support the use of each separately.[107] However, in 2014, Verizon announced that the iPhone 6 and 6 Plus would allow simultaneous voice and data over its LTE Network.[108] T-Mobile and Sprint have enabled calls over Wi-Fi, with Verizon and AT&T soon doing the same.[109]