GTN SIM: What is a SIM Lock? Check Before You Visit Japan!

When traveling to Japan, many people use international roaming, a prepaid SIM, or Wi-Fi to access the Internet.

Have you ever bought and set up a prepaid SIM but found you couldn't use it?

One possible reason could be a SIM lock.

Some of you might not be familiar with the term "SIM lock," so we'll explain it in this article.

1. What is a SIM Lock?

A SIM lock restricts your device to use only the communication services provided by a specific mobile carrier. For example, if your device has a SIM lock from Company A, you won't be able to use it with a SIM card from Company B.

This means that if your cell phone purchased overseas has a SIM lock, you won't be able to use it even if you buy a SIM card in Japan.

So, how do you check if your cell phone is SIM-locked or not?

2. How to Check the SIM Lock Status of iOS Devices

For iOS devices such as iPhones, you can check the SIM lock status as follows:

Go to "Settings" > "General" and tap "About."

Look for "Carrier Lock." It should display "No SIM restrictions" if your device is unlocked. If it shows "SIM lock" or any restrictions, your device is locked.

If this information isn't displayed, please contact your carrier.

3. How to Check the SIM Lock Status on Android Devices

For Android devices, you can check the SIM lock status from the mobile device settings. This process may vary depending on the phone model, but generally, follow these steps: Go to "Settings" > "About Phone" > "SIM Status." If the status shows "Permitted" under "Network," your SIM lock is unlocked.

If you're unsure or can't find this information, please contact your mobile carrier.

When traveling abroad, always check if your mobile device is SIM-locked before purchasing a SIM card for communication. If it is SIM-locked, contact your carrier as soon as possible to unlock it.

4. Buy Your SIM at GTN in Haneda

At the GTN Haneda Airport Garden Store, you can purchase prepaid data-only SIM cards and eSIMs from GTN Mobile. These SIM cards are available at reasonable prices and come in a variety of formats. The store also offers SIM cards with unlimited phone calls.

GTN Mobile is a great choice for anyone traveling to Japan for a brief stay or for business. All you need to bring is your passport to buy a SIM card without any hassle.

*If you wish to purchase a plan that includes voice calls, you will need to provide two pieces of documentation: your passport and a supporting document that verifies your address.

For more information about the products sold at our store, please refer to the following article.

For detailed directions to the GTN Haneda Airport Garden Store, please see the following article.