eSIM.co.jp
ENJA
DestinationsMongolia50GB total / 30 days

Mongolia 50GB total
30-day plan

When you first get this plan, only mobile data works. Voice calls and SMS stay off until you complete an identity check required by local law. [How the check works] After you arrive in Korea, go to an LG U+ counter at the airport and show your physical passport. Also give them the phone number shown on your order page (and the contract number, if one was issued). The check cannot be completed online — only at an airport counter. Once it is done, you can receive calls and SMS. Outgoing calls and SMS may require a separate prepaid charge with LG U+. We never collect or store your passport details, and you don’t enter them when you buy.
The date rolls over around 01:00 Japan time — activating just before that can burn most of day one

Only with eSIM.co.jp

Support you can count on
If a network problem stops you using the plan, we look into what happened and then refund you or send a replacement eSIM.
Keep your Japanese number
Your Japanese line stays in the phone. Your number and LINE do not change.
Support on LINE
Stuck on setup? Message a real person on LINE. Just add us as a friend — no phone call, no account.

Plan details

Coverage
Mongolia
Networks
Unitel（4G）
High-speed data
50GB total
When the period starts
Starts when the eSIM first connects to a local network at your destination — installing it before you leave does not start the clock.
How the period is counted
The plan is counted in local (UTC+8) calendar days, so a day ticks over around 01:00 Japan time
Tethering
Yes
Voice / SMS
This plan includes calls and SMS
Valid for
30 days from activation
Activate by
Activate within 30 days of receiving the QR code
Cancellation
Full refund any time before you add the eSIM to your device
Checking usage
To check your remaining data, dial *1414# (we cannot look it up for you)
Receipt
Download any time from your order page
Please note
Once the QR code has been scanned and the eSIM added to your device, the plan cannot be cancelled or refunded — whether or not the line has been activated. Please check device compatibility and SIM lock status first.

Why you can buy with confidence

Here’s what people usually want to know first.

Your eSIM reaches your inbox within minutes

Delivery is automatic, so late-night orders don’t sit waiting. If nothing arrives within 30 minutes, you can contact us right from your order page.

We never store your card number

Payment happens on the payment provider's screen (Stripe). Your card number never passes through our servers.

Talk to us in Japanese or English

050-1730-9585
Phone lines are open 9:00-16:00 JST, every day.
While you are travelling you can also reach us on LINE.

Who we are, how to reach us, and our refund conditions are all spelled out.Commercial Transactions ActRefundsCompany
30 days / 50GB total
incl. tax

How activation works

Starts when the eSIM first connects to a local network at your destination — installing it before you leave does not start the clock.
Mongolia eSIM — 50GB total, 30 days