MC-LTE and ProSe have direct handset-to-handset mode, but currently there is something like two models on the market with functional support for that. That's i

MC-LTE and ProSe have direct handset-to-handset mode, but currently there is something like two models on the market with functional support for that. That's it. And those are meant for the public safety market. As a direct, infrastructureless mode is required to reach feature parity with existing TETRA based networks.