https://wccftech.com/mmwave-5g-network-will-be-exclusive-to-iphone-12-pro-max-will-launch-in-only-three-countries/

Apple's iPhone 12 series will potentially launch sometime in October. However, we have more leaks and rumors pouring in fast revealing what the devices will look like and what major additions can we expect. Since there will be four variants of the iPhone 12, it is only the high-end 6.7-inch iPhone 12 Pro Max that will add support for the mmWave 5G network.

A new report from Fast Company reveals that only the top-end iPhone 12 Pro Max has the required internal room to support the mmWave 5G technology. In addition to this, the bigger battery size will support it as well since the technology will potentially draw more power.