By Nadia Damouni, Soyoung Kim and Nicola Leske NEW YORK/SAN FRANCISCO (Reuters) - BlackBerry Ltd, on the block as its smartphone business struggles, is in talks with Cisco Systems, Google Inc and SAP about selling them all or parts of itself, several sources close to the matter said. Such a deal would be an alternative to the preliminary agreement reached weeks ago with a group, led by BlackBerry's biggest shareholder, Fairfax Financial Holdings, to take the company private for about $4.7 billion, a bid which has faced some skepticism because of financing questions. ...



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