🇰🇷 eSIM plans for South Korea

Starting at $6.49/day*

No data caps
7-days valid
Fast, reliable connection
Skip the roaming bill
QR code emailed instantly

Get your unlimited data

How many days

More days, lower daily rate

How many eSIMs

More eSIMs, bigger discount

Total

—

Get South Korea eSIM

Install it now or once you're away. Nothing starts counting until you reach your destination and switch the eSIM on.

* The "as low as" figure is the lowest per-day rate, taken from the longest unlimited data plan on sale here.

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Why buy from us?

Here's how Onetel stacks up against other options in South Korea.

Onetel

Local SIM card

Roaming

Uncapped data plans

Activates instantly

Your number stays the same

No surprise charges

No lock-in

24/7 support

🇰🇷

eSIM costs for South Korea

Prices shown in USD

7 days of unlimited data in South Korea costs $46.36 — about $6.62 a day on SK Telecom, KT or LG U+, with no roaming charge and no SIM to swap. In South Korea, 5G is live and median mobile download speed is 145.1 Mbps.

Duration	Data	Price	Daily cost
1 day	500 MB	$7.70	$7.70/day
3 days	—	$20.60	$6.87/day
5 days	—	$33.48	$6.70/day
7 days	100 MB	$46.36	$6.62/day
10 days	—	$65.70	$6.57/day
15 days	2 GB	$97.92	$6.53/day
30 days	3 GB	$194.58	$6.49/day

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Which networks you connect to in South Korea

Your eSIM roams onto South Korea's own operators. These are the networks and the frequencies they run — check your phone supports them before you travel.

Operator	4G / LTE bands	5G bands	5G
SK Telecom	B1, B3, B5, B7, B8	n78, n257	Yes
KT	B1, B3, B5, B7, B8	n78, n257	Yes
LG U+	B1, B3, B5, B7, B8	n78, n257	Yes

145.1 Mbps

Median download

18.0 Mbps

Median upload

Source: Ookla Speedtest Global Index, July 2025

Coverage in South Korea

Subway and underground coverage is near-universal across all carriers; no significant rural not-spots. Foreign phones lacking B5 (850 MHz) may experience reduced LTE coverage in some indoor and rural areas where SK Telecom and KT rely on B5 for low-band reach.

Common Questions

The details worth knowing about your South Korea eSIM

Yes, South Korean carriers have near-universal coverage in subways and underground spaces. On SK Telecom, KT, or LG U+, you should maintain connectivity throughout the metro network.

You may see reduced LTE coverage indoors and in some rural areas. SK Telecom and KT rely on band 5 for low-band reach. The other bands (B1, B3, B7, B8) still cover most locations with strong signals.

Which network your eSIM lands on depends on your provider. All three operators — SK Telecom, KT, and LG U+ — support the same 4G and 5G bands, so performance is generally very similar across them in South Korea.

This eSIM covers South Korea only. It will not work in North Korea. You can use it on Jeju Island without issue. In the DMZ, signal may drop near the border due to official restrictions, so expect limited connectivity there.

Yes, South Korea law requires identity verification for all SIM activations. When you install the eSIM, the provider will ask for a scanned copy or photo of your passport. Activation may be delayed until this is submitted and approved.