This invention, in general, relates to the field of telecommunications. More particularly, the present invention relates to a centralized system and method for providing customized applications for mobile networks enhanced logic CAMEL roaming services to a mobile subscriber. The CAMEL HUB configured to process a request from the mobile subscriber to avail one or more mobile services from a visited network operator. The mobile subscriber device has a subscription to a home network operator and operates in a home CAMEL phase. The visited network operator operates in a visited CAMEL phase. The CAMEL HUB is also configured to allow the mobile subscriber device to avail the one or more mobile services seamlessly from the visited network operator independent of the visited CAMEL phase. The home CAMEL phase may or may not be different from the visited CAMEL phase.