Yes. Your phone must be SIM-free / unlocked to use a Japanese Travel SIM card. If your device is locked to a carrier, the SIM may not work until your carrier unlocks it.
If you’re not sure, we recommend checking your phone’s SIM restriction status with your carrier before ordering.
For travelers who have carrier restrictions, you can also check out our rental Japan travel pocket Wi-Fi, which works just like a wifi device. Please check out our Pocket Wi-Fi detail
You can also check your device compatibility in our SIM card product details page