HELSINKI (Reuters) – Nokia gave an upbeat forecast for its telecom equipment unit Nokia Solutions and Networks (NSN), giving hope for a pickup in what will be the Finnish company’s main business after the sale of its phones division to Microsoft. Shares in Nokia rose 6 percent after the company forecast NSN’s profit margin would improve in the fourth quarter to around 12 percent, plus or minus 4 percentage points, from 8.4 percent in the third quarter. NSN’s third-quarter core operating profit fell 33 percent from a year earlier to 218 million euros ($300. …