Abstract: A communication system (100) permits an inter-network handoff between networks (110, 120) operated by different network service providers, which handoff does not require that the networks interface with each other. A first user terminal (102), engaged in a wireless communication session with a second user terminal (134) via a first such network (110), detects a second such network (120). The first user terminal provides user identity information associated with the first user terminal and applicable in the second network to the second user terminal, and sets up a first leg of a communication session with the second network. The second user terminal puts the communication session with the first network on hold, sets up a communication session with the first user terminal via the second network based on the provided user identity information, and the first and second user terminals terminate the communication session with the first network.

Abstract: A method and system for establishing a call in a communication network is disclosed. The method includes detecting (202) a user-activity at a User Equipment (UE) (104), prior to a special key press. The special key press triggers a request for establishing the call. The method also includes determining (206) based on the detecting whether a latest System Information Block (SIB) is available at the UE. Further, the method includes initiating (208) a Random Access Channel (RACH) session for establishing the call. The RACH session is initiated when the latest SIB is available at the UE and when the special key is pressed. The latest SIB includes parameters for the RACH session.