It is being reported that Samsung is interested in buying Blackberry for $7.5bn.
The report claims representatives from the two companies held meetings last week to discuss the situation.
Blackberry has denied any such negotiations have taken place.
Shares in the phone company shot up at the news, but after Blackberry issued a denial stocks lost 15 percent.
Samsung also claimed reports are groundless.
Blackberry, back in the groove after years in decline, is a work in progress and any takeover will be a punt on the future.