Best 21-day eSIM Plans for Mongolia
Going to Mongolia for 21 days (3 weeks)? These plans cover your full trip โ all with instant QR delivery, no contract, and no SIM card to pick up at the airport.
Starting from (Free)
$7.50
Pro membership โ save 7%
$6.98
Premium membership โ save 12%
$6.60
Recommended 21-day plans โ Mongolia
Best Value
Mongo Mobile & Fiber
999 GB
30 days validity
$89.00
$0.09/GB
All 5 plans covering 21+ days
Mongo Mobile & Fiber
999 GB
30 days validity
$89.00
$0.09/GB
Mongo Mobile & Fiber
20 GB
30 days validity
$29.00
$1.45/GB
Mongo Mobile & Fiber
10 GB
30 days validity
$18.00
$1.80/GB
Mongo Mobile & Fiber
5 GB
30 days validity
$11.00
$2.20/GB
Mongo Mobile & Fiber
3 GB
30 days validity
$7.50
$2.50/GB
Other trip lengths for Mongolia
21-day eSIM plans by destination
Frequently asked questions โ 21-day Mongolia eSIM
What eSIM do I need for 21 days in Mongolia?
Look for a plan with at least 21 days of validity. The plans above all cover your full trip. Activate when you land โ validity starts from first use, not from purchase.
How much data do I need for 21 days in Mongolia?
A typical traveler uses 1โ2 GB per day for maps, messaging, and occasional video. For 21 days that is roughly 21โ42 GB.
When should I install my Mongolia eSIM?
Install before you travel, at home over Wi-Fi. Activation begins when you arrive and connect to a local carrier.
Can I top up if I run out of data?
Many plans are rechargeable. You can purchase an additional plan from LTE.app at any time โ no need to find a SIM card shop.
Save on every trip with Pro or Premium
Pro 7% off ยท Premium 12% off ยท Smart Coach AI ยท Offline activation
Mongolia travel connectivity
All Mongolia pages โ linked for faster research