Vodafone Idea Ltd has extended its partnership with Tata Consultancy Services ( TCS ) for an additional five years, the country's largest IT services firm said on Thursday. "TCS and Vodafone Idea Ltd (VIL) have extended their decade-long strategic partnership for a further five years. VIL is adopting the latest technologies for customer experience enhancement, as it undertakes the world's largest network integration in India," TCS said in a regulatory filing. TCS has been VIL's technology partner in this journey, managing all of its customer-facing applications, it added.