Breaking: with $4.7 billion offer, Blackberry signed a tentative deal to be acquired by a consortium led by its biggest shareholder.

Following the difficult launching of BBM, the sales of Q10, Z10, Q5 at half-mast and the massive layoffs underway; BlackBerry, finally, this Monday signed a tentative deal to be acquired by a consortium led by its biggest shareholder. The offer comes from a

consortium led by Fairfax that has offered $9 a share in cash to take BlackBerry private. The group is seeking financing from Bank of America Merrill Lynch and BMO Capital Markets to complete the deal.