//Other methods
public static void ExecuteTests()
{
GSMTest instance = new GSMTest();
for (int i = 0; i < instance.mobilePhones.Length; i++)
{
Console.WriteLine(instance.mobilePhones[i].ToString());
Console.WriteLine();
}
}
static void Main()
{
GSMTest.ExecuteTests();
GSMTest.DisplayIphone4S();
GSMCallHistoryTest.CallHistoryTest();
}