Research in Motion Ltd said on Thursday its business in China is developing as planned, although the company has not yet started selling handsets there.

Charles Liu, RIM's general manager for China, indicated that the decision about when to sell its smartphones was in the hands of its service partner, China Mobile. RIM had said in October it expected sales to start in 2007.

"You should ask China Mobile about the timeline," Liu, RIM's top executive in China, told Reuters. "From my perspective, everything is according to plan."

A RIM spokeswoman confirmed that no handsets had been officially sold yet in the mainland Chinese market. China Mobile was not immediately available for comment.

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