The telecom industry has grown rapidly over the last 20 years, dramatically changing communication globally. Mobile phone penetration is approaching 50% worldwide, with some countries exceeding 100% penetration. The battle for market share in mobile services has driven significant advertising spending in the telecom sector. In India, the number of subscribers has surpassed half a billion, second only to China, with many new operators entering and engaging in price wars. Currently, spectrum allocation is a key issue, with the government recommending operators surrender 900MHz spectrum at license renewal and reauctioning it, which telecom companies oppose due to the high costs of infrastructure replacement.