Stock in Blackberry-maker Research In Motion is testing lows it hasn't hit since 2003, amid reports the company is considering selling its handset manufacturing unit or a stake in the whole company.

The reports, based on an article in the Sunday Times newspaper that did not cite sources, were immediately downplayed by the Waterloo-based company.

Others have speculated in the past that R-I-M might be sold or broken up, or that its hardware division might be separated from its services division, the highly touted global network that relays device messages.