Yes, you can use your Air SIM card with both 3G and LTE networks. However, LTE connectivity varies depending on LTE coverage.
Air SIM for Global
LTE coverage for the Air SIM Global depends on your country of use. Please refer to "Available Countries" in our pricing page for more details.
Air SIM for Japan
LTE coverage in Japan for Air SIM (plan-D) is provided by NTT docomo's LTE network.
LTE coverage in Japan for Air SIM (plan-K) is provided by KDDI's LTE network.