Tata Communications is planning to invest $500 million in WiMAX services by 2010, and is in talks with investors to sell minority stake in its retail business.The company has selected Telsima Corporation to provide WiMAX solutions for broadband wireless network in India.According to a release issued by TCL to the BSE today, the company is the first to launch broadband services on the WiMAX platform on a large scale for retail consumers in India. In the initial phase, the WiMAX network will offer broadband Internet access and content services to enterprises and residential customers in Delhi, Mumbai, Pune, Bangalore, Chennai, Hyderabad, Cochin, Chandigarh, and Kolkata."Tata Communications seeks to enrich life by enabling reliable and affordable communication anytime, anywhere," said Shankar Prasad, president (retail business unit), Tata Communications.