Qualcomm expects to have enough mobile mmWave chips for a few hundred phones before Xmas. Unless Samsung or Huawei has a stealth project, those few hundred will probably be all the 5G phones in 2018. Buried in the bottom of this Ericsson-Verizon pr is
To prepare for 5G, Ericsson has released its first commercial 5G RAN software, allowing operators to turn on 5G in commercial networks when ready.
None of the other four major vendors - Huawei, Nokia, Samsung, and ZTE - has announced their mobile version of the RAN software is commercial. The line between trials and early deployment isn't always clear. Ericsson's announcement does not imply they are ahead, but mobile 5G, at true gigabit speeds, is a great accomplishment for any company. Fixed modems can be bigger, have larger antennas, and be line-powered. Shrinking to the size of a phone is remarkable.
"Fixed wireless 5G" is in "commercial production" at Elisa in Finland, Ooredoo in Qatar, Etisalat in UAE, & Saudi Telecom. They have all put out press releases they are "first in the world." (Elisa with Huawei.)