Voice revenue continue to outpace data revenue by a ratio of 3.6 to1, with 73% of US wireless users subscribe to voice plans, while only 25% subscribe to data plans, according to a report by Validas.

The report said that the data plans narrow the gap in the average revenue generated per line, where voice plans average $39.53 in charges per user versus data plans at $31.78.

In addition, the report revealed that when recurring revenue includes pay-per-use, overage and add-on charges, voice outpaces data by a ratio greater than 4 to 1.

Ed Finegold, executive vice president of analytics at Validas, said: "Data and apps represent growth for carriers, but voice still pays the bills.

"I disagree with analysts who argue that voice is becoming less important to wireless users because of apps and mobile Internet. Our studies show that wireless data users use more of everything, especially voice minutes."