The document discusses a case study on Lebara, a telecom operator for migrant communities, focusing on their partnership with Sabio to build a robust contact center technology infrastructure using Avaya. The implementation has led to significant improvements in customer service performance, including rapid call handling and high customer satisfaction scores as evidenced by their Net Promoter Score. Lebara's success is attributed to its innovative customer service approach, including the 'Smile Initiative', and a strategic commitment to optimize its contact center technologies to meet growing demands.