The present disclosure describes systems and methods for a user equipment (110) wirelessly communicating with another user equipment (112) using dual connectivity (DC) with a terrestrial base station (131) and a satellite (135) or high-altitude platform (137). The described methods and systems include a principal routing manager (218) assessing (755) that different subsets of data (310), to be transmitted from the user equipment (110) to the other user equipment (112), can use different, respective qualities of service (QoS) offered through different wireless-communication networks (121, 123) associated with the terrestrial base station (131) and the satellite (135) or high-altitude platform (137). The principal routing manager (218, 226) causes a routing command message to be sent (704) to the user equipment (110), directing the user equipment (110) to enter (760) a state of dual connectivity with the terrestrial base station (131) and the satellite (135) or high-altitude platform (137) and transmit (710, 712) the different subsets (311, 312) of the data (310) in accordance with the QoS offered by the different wireless-communication networks (121, 122, 123) that are associated with the terrestrial base station (131) and satellite (135) or high-altitude platform (137).