The , which has won praise for fast downloads of 12 Mbit/sec. or more, went on sale two weeks ago. The first went on sale at Verizon stores in February.

Piecyk that his firm called 150 Verizon stores in 22 major cities in the last week asking whether more ThunderBolts or 4s were sold.

A total of 61% of the stores said they sold the same amount of both phones, while 28% had sold more ThunderBolts and 11% said they sold more iPhones (mainly in the Southeast U.S.).

Verizon rarely reveals sales figures, although the company did say that the iPhone 4 launch resulted in more sales in the first two hours than any other phone.

Verizon could not be reached immediately on Friday to comment about the BTIG survey.