According to The NPD Group, consumer sales of smartphones to US consumers represented 23% of all handset sales in Q4 2008 compared to just 12% in Q4 2007. Led by the release of iPhone 3G at $199, the average price for a smartphone fell 23% from $216 in Q4 2007 to $167 in Q4 2008. While half of smartphones on the market now sold with touch screens, 70% of all models instead offer QWERTY keyboards. 66% of smartphones now use 3G networks, compared to just 46% a year ago. 52% of smartphone buyers purchased an accessory at the time of their phone purchases, compared to just 41% among all other phone buyers.