Nokia Corp. (NYSE: NOK) and Siemens AG (NYSE: SI; Frankfurt: SIE) are the headliners in today's regional roundup.

Nokia and Siemens are now looking at restructuring their Nokia Networks joint venture as their attempts to sell a significant stake in the global vendor, which generated interest from the private equity sector, appear to have failed, according to a report in the Wall Street Journal. The plan would involve Nokia and Siemens injecting more cash into NSN, says the report. (See Euronews: NSN Stake Bids Fall Away and NSN Seals Moto Wireless Deal.)

Following on from BT Group plc (NYSE: BT; London: BTA)'s announcement of a "white space" wireless trial on the remote Scottish Isle of Bute earlier in the month comes news from the Financial Times of a similar but much larger experiment that will take place in Cambridge, U.K. and count Microsoft Corp. (Nasdaq: MSFT), the British Broadcasting Corp. (BBC) , Nokia, Samsung Corp. , Sky and BT among the participants. The focus of this group appears to be the formation of wireless broadband hotspots for smartphone/tablet/Wi-Fi device connectivity. (See Openreach Trials 'White Space' Broadband.)

Magyar Telekom plc , the Hungarian operator owned by Deutsche Telekom AG (NYSE: DT), has agreed to settle a Securities and Exchange Commission (SEC) investigation into potentially illegal payments at its Montenegrin or Macedonian units, reports Reuters.

Phil Roberson, who was appointed head of devices at T-Mobile (UK) /Orange UK joint venture EE last year, is defecting to Taiwanese handset giant High Tech Computer Corp. (HTC) (Taiwan: 2498), reports The Independent. Roberson will be based at the HTC's new European headquarters, which are located in the U.K.

— Paul Rainford, Assistant Editor, Europe, Light Reading