A BlackBerry handheld device with both mobile phone and Wi-Fi wireless capabilities is on its way, according to Jim Balsillie, co-CEO of BlackBerry maker RIM (Research In Motion).

Speaking at the JP Morgan Technology Conference on Wednesday, Balsillie said such a converged BlackBerry should come out "in the back half of this year".

RIM is behind its competitors in developing devices with both mobile phone and Wi-Fi functions.

Motorola and Nokia were both selling phones with Wi-Fi and mobile aimed at business users last year. RIM had recently hinted at forthcoming converged phones but until now, hadn't said when they would ship.

"Wi-Fi was overhyped," Balsillie said. "I was not a big believer in it for the first two or three years because it was hyped as something that would subsume everything, that you would get rid of your mobile phone. We feel it's complementary to a mobile phone."