Application information: Application of Sorting by Phone Network Directory is an application that helps you quickly categorize your phone book by network: Viettel, VinaPhone, MobiFone, Vietnamobile ... Application Arrange Home Phone Directory to support users can quickly distinguish the phone number in their contacts of any network to know how to use the network, or the network from which to determine the way manage spending in your phone account. Application Arrange Home Phone Directory to he