Voice calling over 3G on the iPhone 6 and 6 Plus devices has dropped sharply across mobile networks in the U.S. and is one-fifth of that on previous iPhone models, as users adopt Voice-over LTE (VoLTE) services, reports Newfield Wireless, a Tektronix Communications company and provider of next-generation Radio Access Network (RAN) geoanalytics.

Verizon and AT&T plan to enable VoLTE- to-VoLTE connections between Verizon Wireless and AT&T customers in 2015. Verizon introduced its Advanced Calling 1.0 services across the United States in September.  AT&T introduced VoLTE services in its initial markets earlier this year, and continues to expand to more markets across the United States.

UK’s mobile operator EE today switched on its LTE-Advanced network in central London. The EE 4G+ technology uses 2.6GHz spectrum, and is available in large parts of central London, including Shoreditch, Old Street, Southbank, Soho, Westminster and Kensington. 

The Federal Trade Commission filed a federal court complaint against AT&T Mobility, charging that the company has misled millions of its smartphone customers by charging them for “unlimited” data plans while reducing their data speeds, in some cases by nearly 90 percent.