CAMBODIA’S mobile-phone sector will grow 62 percent this year, according to a new report by London-based Business Monitor International (BMI), more than the 42.5 percent last year. Announcing the new study Tuesday, BMI said that increased competition in the sector would drive the Kingdom towards 6.23 million users this year. However, it was not clear whether the study counted SIM cards or active users, an important distinction given the large number of users in Cambodia who swap among operators to get the best tariffs.