TORONTO (AP) — The chief executive of Research In Motion said he’s disappointed the new BlackBerry won’t be released in the United States until mid-March, but he said early data suggests sales in the U.K. are above expectations.

Thorsten Heins said in an interview Monday with The Associated Press that he was disappointed in the mid-March U.S. release date. But he said the U.S. and its phone carriers have a rigid testing system.