There are good reasons for this, like the total cost and the stability of GSM, plus the fact that it makes roaming easier for people travelling to and from Sierra Leone at a time when the majority of the world's cellular networks run GSM.
With the ability to include up to 15 fans total, the Hailstorm II encompasses one of the most powerful airflow designs available, providing prolonged stability and ensuring every component operates at peak performance with zero heat related bottlenecks.