https://wccftech.com/iphone-12-5g-speeds-slower-versions-2020/

Since Qualcomm and Apple have resumed business relations, it’s almost guaranteed that the upcoming iPhones will offer 5G connectivity thanks to the Snapdragon X55 modem. This claim is also backed by various reports. However, what wasn’t clear until today was whether the iPhone 12 5G speeds would be fast or not, and according to one report, it’s revealed that if customers want to experience the best wireless throughput that’s expected from the 5G standard, they might have to wait until 2021.

To refresh your memory, there are two 5G bands that are currently in operation; a sub-6GHz one and a mmWave one. The mmWave band offers speeds over 1Gbps, meaning that if you have a smartphone equipped with a 5G modem that supports mmWave, are connected to a network that supports the same band and if the handset features multiple antennas, you’ll get to experience those speeds. As for the existing sub-6GHz networks, these provide speeds of around 100-150Mbps range, meaning that iPhone 12 5G speeds might have an adverse impact on user experience should these only support the sub-6GHz brand as opposed to those connected to mmWave networks.