PREMIUM 4G　LTE-Advanced 5CA対応ハイエンドモデル使用
IPv6を掴めるとさらに速い

PREMIUM 4G　LTE-Advanced
https://www.nttdocomo.co.jp/area/premium_4g/
https://www.nttdocomo.co.jp/area/premium_4g/images/img_09_pc.gif
https://www.nttdocomo.co.jp/area/premium_4g/images/img_17_pc.gif

IIJmio
https://i.imgur.com/VYy9J4v.png
https://i.imgur.com/OEuULWX.png