Reuters reports that executives of Siemens and Nokia sent a rare joint letter to clients of struggling telecom gear making venture Nokia Siemens Networks, affirming their support for its future. “We continue to support investment in the future of the company, both in terms of expenditure and potential acquisitions and partnerships,” Siemens Chief Financial Officer Joe Kaeser and Nokia Chief Executive Olli-Pekka Kallasvuo said in a letter dated December 9.