worldwide in 2006, up 24% from the 2005 figure. Strategy Analytics says 16 of the top 19 vendors grew slower than the market average during Q4 2006, with Motorola in particular slumping dramatically and Sony Ericsson doing best Another Strategy Analytics survey recorded a eighth straight quarter of increased churn from wireless networks around the work. One in five operators experienced falling data ARPUs in Q4 2006, and the average revenue per minute of voice also dropped by 17%.