In case you missed it, try this if you are a Docomo iPhone customer: open the Docomo Speed Test app and tap the Area Map button. The previous red area has been replaced by yellow. The app needs to be updated but the red now indicates the areas with 1288Mbps~988Mbps Gigabit-class ‘Premium 4G‘ service, just in time for the iPhone 11 and iPhone 11 Pro release.
I am fortunate to live in a red 4G Gigabit speed area and my iPhone XS 4G speed is faster than my NTT East FLET’S HIKARI ‘mansion type’ VDSL service. It’s an older apartment building where telephone lines and VDSL are the only way to connect to the internet. That’s depressing to think about, but it will have to do until I can move to a place with direct fiber connection service. At least my iPhone XS 4G LTE is fast and will get faster if I upgrade to iPhone 11 Pro.
KDDI au is offering similar 4G LTE Gigabit-class carrier aggregation service for iPhone 11 customers. Be sure to check details and coverage with your carrier.