Finland-based mobile phone supplier Nokia has signed agreements with Chinese customers China Mobile and PTAC valued at over $2.5 billion for 2006.

To date, Nokia has invested over $4.2 billion in China, and continues to invest in manufacturing, sales and R&D in the Chinese market.

The frame agreement with China Mobile relates to the purchase of GSM/GPRS network equipment from Nokia with a value of approximately $735 million during 2006. The agreement with the Chinese national mobile phone distributor PTAC relates to the purchase of mobile devices from Nokia with an estimated value of at $1.9 billion for 2006.

Nokia's operations in China include two mobile phone plants, two network manufacturing plants, and six R&D units focusing on both the Chinese and global markets. On Sept. 1, Nokia said it would expand its recently established 3G R&D center in Chengdu, Sichuan province.