้huawei has focused on expanding its mobile technology and networking solutions through a number of partnerships. In March 2003, Huawei and 3Com Corporation formed a joint venture company, 3Com-Huawei (H3C), which focused on the R&D, production and sales of data networking products. The company later divested a 49% stake in H3C for US$880 million in 2006. In 2005, Huawei began a joint venture with Siemens, called TD Tech, for developing 3G/ TD-SCDMA mobile communication technology products. The US$100 million investment gave the company a 49% stake in the venture, while Siemens held a 51% stake.[20] In 2007, after Nokia and Siemens co-founded Nokia Siemens Networks, Siemens transferred all shares it held in TD Tech to Nokia Siemens Networks. At present, Nokia Siemens Networks and Huawei hold 51% and 49% shares of TD Tech respectively.[35]