5G is just a standard published by an organization. The purpose is to push industry to innovate. The requirements are so high end, it takes tremendous money and energy to make it. Technology is no longer the bottleneck. The bottleneck is no killer app to allow companies to get profit. Many companies are hesitating since it needs billions of investment while no profit in foreseeable future. Huawei is the ONLY global company that has plan to deploy in large scale in 2019. Yeah, Verizon said it will, shh, only as advertisement. AT&T also said it will, shh, only a couple cities as a test at the end of 2019.
You now know why US government is scared enough. Do not blame Verizon and AT&T since both of them are heavily in debt because of net neutrality where Netflix and YouTube are eating their profit.