The new, lighter iPhone 5 has a bigger screen, punchier processor, LTE and dual-band WiFi, but if you plan to pick one up for Sprint's network, you can't have it all. Carrier spokesperson Michelle Leff Mermelstein told Phone Scoop that its version of HD Voice will not work on Apple's new wünderphone. While most carriers use WCDMA networks to achieve the greater definition, Sprint uses
