NEW YORK. Research In Motion, maker of the BlackBerry smartphone, fell the most in six weeks in U.S. trading as a Sanford C. Bernstein Ltd. survey found more companies opting for rival devices such as Apple’s iPhone.

 

Of 200 companies in the U.S. and U.K. surveyed, 74 percent now let their employees use devices other than BlackBerrys, Sanford reported.