Bharti Airtel is an Indian telecommunications company that operates in 20 countries across South Asia, Africa, and the Channel Islands. It is the largest mobile operator in South Asia with over 303 million subscribers. Airtel started in India in 1984 assembling push-button phones and has since expanded to offer 2G, 3G, and 4G services across its markets. As Airtel grew rapidly, it faced challenges around maintaining quality of service and making major IT investments to support its large customer base. Its strengths include its large size and pan-India presence in India, while weaknesses include outsourcing of core systems and a lack of emerging market investment opportunities.