Nokia had planned to announce new devices including a phablet, a smartphone with a screen larger than 5 inches, to revamp its lineup of Lumia smartphones which use Microsoft's Windows Phone software. It was supposed to be in the shops this month.
One of the sources said the launch event, originally scheduled to take place in New York late this month, has been pushed back by several weeks. Under Elop, Nokia struggled to close the gap with Samsung Electronics and Apple in smartphones, although it has stepped up its pace of product launches in the past year.
Samsung has led the way in phablets, proving wrong early critics who said they were too clunky.