Abstract: A method executed by a UE communicatively connected to a first 3rd Generation Partnership Project (3GPP) network utilizing an advanced Radio Access Technology (RAT) is provided. The methods includes the following steps: receiving a message from the first 3GPP network, which indicates that the first 3GPP network supports IP Multimedia Subsystem (IMS) voice over Packet Switched (PS) sessions; and providing an indication that fallback of the UE to a second 3GPP network utilizing a legacy RAT is disabled to the first 3GPP network in response to the receiving of the message.

Abstract: A method executed by a UE communicatively connected to a first 3rd Generation Partnership Project (3GPP) network utilizing an advanced Radio Access Technology (RAT) is provided. The methods includes the following steps: receiving a message from the first 3GPP network, which indicates that the first 3GPP network supports IP Multimedia Subsystem (IMS) voice over Packet Switched (PS) sessions; and providing an indication that fallback of the UE to a second 3GPP network utilizing a legacy RAT is disabled to the first 3GPP network in response to the receiving of the message.

Abstract: A system includes a local mobile network and user equipment, where the user equipment is configured to detect a local network identity of a local mobile network, determine whether a selected condition involving the local network identity is satisfied, and indicate whether a breakout connection is appropriate based on whether the selected condition is satisfied. The breakout connection is appropriate when the selected condition is unsatisfied. A non-breakout connection is appropriate regardless of whether the selected condition is satisfied or unsatisfied In some embodiments, the selected condition is satisfied when the local network identity corresponds to a network identity of a home public land mobile network or an equivalent home public land mobile network.