(Telecompaper) Blackberry said it will cut approximately 4,500 jobs and streamline its smartphone portfolio from six to four devices. It will focus on enterprise and prosumer-centric devices, with two high-end and two entry-level handset in all-touch and QWERTY models. With the launch of the BlackBerry Z30 this week, the company will re-tier the BlackBerry Z10 smartphone to make it available to a broader, entry-level audience. The special committee of the board of directors continues to evaluate all strategic alternatives for the company. Blackberry aims to cut operating expenditure by some 50 percent by the end of the first quarter of its 2015 financial year. In the second quarter of its 2014 financial year, it predicts a GAAP net operating loss of approximately USD 950-USD 995 million, including a pre-tax restructuring charge of USD 72 million.