a method for providing universal access to service features by subscribers of a wireless telecommunications service provider comprises establishing a gateway switch interconnected to a plurality of mobile switching centers maintained by other wireless service providers . trunk connections and signaling links between each mobile switching center and the gateway switch allow the gateway switch to establish call connections and apply service features . advantageously , the gateway switch is responsible for applying service features and establishing call connection for its subscribers and thereby , results in predictable access to wireless telecommunications services .