Four years ago, the system infrastructure and devices were complete for the Phase I and Phase II’s to enable convergent networking. Next, we need to do more work together with the whole industry, and try to make joint operation of TDD-FDD mature as early as possible. After GTI successfully converged TDD and FDD, they started to aim higher and began development on 5G. In 2015, with having, by this time 18 operators at GTI who built the FDD-TDD convergent networks. This gave a clear indication of how successful such an exercise an turn out.