An LTE base station may receive a release command for a voice bearer carrying an IMS voice communication of a user device. The release command may be provided by a core network following a termination of the IMS voice communication. The LTE base station may initiate timer for a predetermined time period following in response to the voice bearer release command. When the LTE base station is carrying an active data bearer for data traffic of the user device at an end of the predetermined time period, the LTE base station may direct the user device to switch from the LTE base station to a 5G base station of the wireless carrier network. When the LTE base station is not carrying any active data bearer for the data traffic at the end of the predetermined time period, the LTE base station may place the user device into an idle state.