Are you planning to visit Japan? You might have planned your travel and book flight. So, you have missed one thing: how to stay connected? This is the main reason why travelers choose eSIM as they’re easy to install and help you save money on roaming. But here’s the catch: most eSIM for Japan providers say that your phone must be unlocked. What does that mean? And why is it so important? In this blog, we’ll clear the confusion.
What is an “Unlocked Phone”?
An unlocked phone does not have any connection to any network provider. In contrast, you may have noticed that a locked phone only works with the network provider from whom the phone was purchased. Carriers lock devices to keep customers from switching easily. If your phone is locked, installing an eSIM for Japan won’t work because your phone will reject the new network.
Why Is an Unlocked Phone Required for eSIM in Japan?
An eSIM works like a digital SIM card. You need to connect with a compatible network provider when you’re in Japan. If your phone is locked, the network settings will be under control of your current carrier provider. That means you can’t activate any other provider’s plan — whether it’s for Japan or anywhere else.
Will My Phone Work for eSIM in Japan? How to Check
Two things matter: eSIM support and band compatibility.
- Check eSIM support: Go to your phone’s settings, open Mobile/Cellular and after that Add Cellular Plan. If this option is there, your phone supports eSIM.
- Check network bands: Japanese networks use specific bands like Band 1 (2100 MHz). In case you have an older device, your phone may not be able to use these bands, even an unlocked phone won’t help.
How Do I Unlock My Phone Before Traveling?
Contact your carrier. Most allow unlocking if your contract is complete or the phone is fully paid off. It usually takes 24–72 hours. For iPhones, once your carrier confirms the unlock, it applies automatically. Android users might need to enter an unlock code. Make sure to do this before leaving your country because unlocking in Japan can be difficult.
What If My Phone Is Locked? Alternatives to eSIM Japan
Don’t worry if unlocking isn’t an option. You still have choices:
- Pocket Wi-Fi: Rent a portable Wi-Fi device. It connects multiple devices, but you’ll need to carry it and keep it charged.
- Physical SIM: Buy a prepaid SIM in Japan. The downside? You’ll need to swap cards and risk losing your original SIM.
Can Region-Locked or Samsung-Locked Devices Use eSIM?
Sometimes, phones are not carrier-locked but region-locked. For example, a Samsung phone bought in one region may only allow SIMs from that region. eSIM won’t work in such cases. If your phone shows “SIM network unlock PIN” or “Regional lock” errors, you need to remove these restrictions before travel.
How to Confirm eSIM and Japan Band Compatibility
Before buying an eSIM, confirm three things:
- Your phone is unlocked.
- It supports eSIM.
- It works on Japanese network bands.
Risks of Buying eSIM for Japan with a Locked Phone
If your phone is locked and you still buy an eSIM Japan, you’ll waste money. You will be able to download the QR code, but your profile will not activate. Some people regret later as they invest in pocket Wi-Fi. So, if you travel often to Japan, always check your phone status before buying.
Should You Unlock Your Phone BEFORE the Trip?
Absolutely. If you’re travelling abroad, yes, an unlocked phone is a benefit. You get flexibility to switch plans easily. When you buy eSIM plans from multiple network providers, you can easily travel to different countries. Unlocking now saves you trouble later.
Steps to Activate eSIM Japan Once Your Phone Is Ready
- Buy an eSIM from a trusted provider.
- Scan the QR code sent by email.
- Install the plan in your phone’s settings.
- Turn on data roaming, and you’re online.
It takes a few minutes if your phone is ready.
Conclusion
Before you buy an eSIM for Japan, check that your phone is unlocked and is capable of eSIM functionality. Doing this will save you money, stress you at the last minute, and you’ll know you are connected as soon as you arrive in Japan, within your first hour. You may also face a situation when you will not be able to unlock your phone. At this stage, you need to know other options such as Pocket Wi-Fi or a physical SIM. In both ways, you will be able to save time and headaches on your next trip