Huawei reports 30+ networks in 2016. Networks have already been deployed from Bangkok and Jakarta, to Riyadh and Istanbul, Paris, Berlin and Vancouver. T-Mobile, Sprint, and AT&T in the U.S. are confirmed for 2017. Eric Zhao of Huawei believes the time has come where 4x4 should be the standard choice and Massive MIMO is right for hotspots. He predicts 100+ four antenna networks by the end of 2017.
4T4R (four transmit and four receive,) three or four carriers aggregated (60-80 MHz,) and 256 QAM signaling combine for close to a gigabit- Gig LTE. That's the hottest trend of 2017 and about 5x more than early LTE.
Christopher Hopcraft, Chief Technology Officer of fast-growing TRUE in Thailand, has deployed 4x4 across most of the network in his country with a population slightly higher than France or England.