Why Japan eSIMs Sometimes Need a Manual APN
Most eSIM plans configure everything automatically when you scan the QR code. Japan is the exception. Some Japanese carrier networks — including the one powering CryptoeSIM Japan plans — require you to manually enter an APN (Access Point Name) before mobile data works.
The symptom is easy to spot: your eSIM shows full bars and a carrier name, but websites won't load, apps won't connect, and nothing works. The fix takes under two minutes.
vmobile.jpLeave all other fields (username, password, MCC, MNC) blank unless instructed otherwise by support.
When Should You Set the APN?
Set the APN after you've installed the eSIM and after you've enabled Data Roaming, but you still have no internet. If data is working fine, you don't need to touch APN settings at all.
Typical scenario: you land in Japan, enable the eSIM, turn on Data Roaming — signal appears but nothing loads. That's your cue.
How to Set APN on iPhone (iOS)
Apple restricts APN editing on carrier-provisioned plans, but Japan eSIM plans from CryptoeSIM allow manual configuration. Here's the path:
iOS Step-by-Step
- Open Settings
- Tap Cellular (or "Mobile Data" depending on your region)
- Tap your CryptoeSIM Japan line (not your home SIM)
- Tap Cellular Data Network (scroll down if you don't see it immediately)
- Under the Cellular Data section at the top, clear any existing APN and type:
vmobile.jp - Leave Username and Password blank
- Press the Home button or swipe up to exit Settings — changes save automatically
- Toggle Airplane Mode on for 10 seconds, then off to force a reconnect
iOS: What the APN Field Should Look Like
- APN: vmobile.jp
- Username: (leave blank)
- Password: (leave blank)
- LTE Setup (Optional APN): (leave blank)
The MMS section below does not need to be filled in — you only need the top "Cellular Data" APN field for internet access.
How to Set APN on Android — Samsung Galaxy
Samsung uses its own menu structure. The path varies slightly between One UI versions, but here's the most common route on Galaxy S-series and A-series phones:
Samsung Galaxy Step-by-Step
- Open Settings
- Tap Connections
- Tap Mobile networks
- Tap Access Point Names
- Tap the + (Add) button or the three-dot menu and select New APN
- Set Name to anything you like (e.g., "vmobile Japan")
- Set APN to
vmobile.jp - Leave all other fields as-is or blank
- Tap the ⋮ three-dot menu at the top right → tap Save
- Tap the radio button next to your new APN entry to select it
- Reboot the phone or toggle Airplane Mode to apply
vmobile.jp and save.
How to Set APN on Android — Google Pixel & Stock Android
Google Pixel phones and other devices running near-stock Android (like Nokia, Motorola, or Android One devices) use a slightly different path:
Google Pixel / Stock Android Step-by-Step
- Open Settings
- Tap Network & internet
- Tap SIMs
- Tap your CryptoeSIM Japan SIM from the list
- Tap Access Point Names
- Tap the + (Add) icon in the top right
- Set Name to anything (e.g., "vmobile Japan")
- Set APN to
vmobile.jp - Tap the ⋮ three-dot menu → Save
- Tap the radio button next to the new entry to select it
- Toggle Airplane Mode or reboot to apply the change
APN Settings Not Saving? (Greyed Out)
If the APN field is greyed out and you can't edit it, this usually means the carrier profile has locked APN editing. Try these fixes:
- Android: Go to Settings → Apps → find "Carrier Services" or your carrier app → Force Stop → then retry APN editing
- Android: Some Samsung devices require disabling "Auto-select APN" first (found in the same APN screen)
- iOS: If "Cellular Data Network" doesn't appear at all, restart your iPhone with the eSIM active, then check again
- If none of the above work, contact our support team — we can provide a carrier configuration profile that sets the APN automatically
After Setting the APN — Checklist
- ✅ APN set to
vmobile.jp(exact spelling, lowercase) - ✅ CryptoeSIM Japan line is enabled and set as the active data SIM
- ✅ Data Roaming is ON for the CryptoeSIM line
- ✅ Airplane Mode toggled off after saving APN
- ✅ Waiting 30–60 seconds for the connection to register
If you've checked all five boxes and still have no data, the issue may be something else entirely. Use our live support chat — our team knows Japan eSIM setups inside out and can diagnose the issue in minutes.
Frequently Asked Questions
Does every Japan eSIM need the vmobile.jp APN?
No — it depends on the underlying carrier network the eSIM uses. CryptoeSIM Japan plans that route through the vmobile.jp network require this APN. If your plan uses a different network, data may work without any manual APN configuration. When in doubt, try the APN setting — it won't break anything on other networks.
What if I'm using an older iPhone (iPhone X or XS)?
The same steps apply. Older iPhones that support eSIM (XS, XS Max, XR onwards) have the same Cellular Data Network menu. The only difference is that some older iOS versions label it slightly differently — look for "Cellular Data Network" or "Mobile Data Network."
Do I need to set the APN every time I visit Japan?
No. Once the APN is saved on your device, it stays associated with that eSIM profile. The next time you enable the same Japan eSIM, the APN will already be set.
Can I use my Japan eSIM for calls and SMS too?
CryptoeSIM Japan plans are data-only. They do not include voice calls or SMS. You can still receive calls and texts through your home SIM (which stays installed alongside the eSIM) or use internet-based communication apps like WhatsApp, iMessage over data, or FaceTime Audio.
Will this work in rural Japan, not just Tokyo?
Yes. The vmobile.jp network has nationwide coverage across Japan including rural areas, though as with any carrier, signal strength may vary in very remote mountainous regions. Major cities, transit routes, and tourist areas all have excellent coverage.