In short
Our picks. Tap to see today's price at Vacay
- Light use, lowest priceBest Korea 5GB, ฿109 (≈ $3.60) for 5 daysBuy at Vacay →
- Cheapest unlimitedBest Korea Unlimited 10 Mbps, ฿329 (≈ $10.86) for 5 daysBuy at Vacay →
- A local SIM, unlimited and never slowedSKT Unlimited 4G, ฿559 (≈ $18.45) for 5 daysBuy at Vacay →
- You'll use the subway a lotLG U+ Unlimited, which comes with a free T-Money cardBuy at Vacay →
- iPad or Google PixelBest Korea. Vacay says the SKT and LG U+ plans don't work on themBuy at Vacay →
New Vacay customers: 10% off
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Prices are from Vacay, the eSIM store GoeSIM partners with, on 21 Oct 2026, in baht. Check the current price before you buy.
Local SIM or roaming
| Plan | Network | Good to know |
|---|---|---|
| SKT Unlimited | SK Telecom, local | Biggest network, not slowed |
| LG U+ Unlimited | LG U+, local | Free T-Money card |
| Best Korea | LG U+ and SKT, roaming | Cheapest, top-ups |
SKT and LG U+ come in 4G or 5G; SKT shares a hotspot of 1GB a day. Best Korea comes by the GB, unlimited or daily, and needs Data Roaming on.
Korea's mobile internet is fast nearly everywhere, including Seoul, Busan, Jeju and the subway, so the choice is about price and conditions more than coverage.
Unlimited plans
| Plan | 5 days | 7 days | 10 days |
|---|---|---|---|
| Best Korea Unlimited 10 Mbps | ฿329≈ $10.86 | ฿449≈ $14.82 | ฿609≈ $20.10 |
| Best Korea Unlimited full speed | ฿429≈ $14.16 | ฿589≈ $19.44 | ฿809≈ $26.70 |
| SKT Unlimited 4G | ฿559≈ $18.45 | ฿749≈ $24.72 | ฿999≈ $32.97 |
| LG U+ Unlimited 4G | ฿689≈ $22.74 | ฿879≈ $29.01 | ฿1,029≈ $33.96 |
| SKT Unlimited 5G | ฿699≈ $23.07 | ฿849≈ $28.02 | ฿1,079≈ $35.61 |
| LG U+ Unlimited 5G | ฿899≈ $29.67 | ฿1,040≈ $34.32 | ฿1,199≈ $39.57 |
Best Korea is the cheapest. Its full-speed option gives 5GB a day at full speed, then 10 Mbps, which is still enough for maps, social media and video calls.
For a local SIM, SKT 4G costs less than LG U+ 4G (฿130 (≈ $4.29) less for 5 days). Both are unlimited and not slowed down; SKT 4G reaches up to 100 Mbps, more than enough for travel.
By the GB
Best Korea runs at full speed until the data is used up. You can top it up without changing SIM.
| Data | 5 days | 7 days | 10 days |
|---|---|---|---|
| 3GB | ฿79≈ $2.61 | ฿89≈ $2.94 | ฿99≈ $3.27 |
| 5GB | ฿109≈ $3.60 | ฿119≈ $3.93 | ฿129≈ $4.26 |
| 10GB | ฿179≈ $5.91 | ฿189≈ $6.24 | ฿199≈ $6.57 |
| 20GB | ฿359≈ $11.85 | ฿379≈ $12.51 | ฿399≈ $13.17 |
The number of days barely changes the price, so buy a few spare days. But past 10GB, unlimited wins: 20GB for 5 days (฿359 (≈ $11.85)) costs more than Best Korea Unlimited 10 Mbps (฿329 (≈ $10.86)).
Not sure how much you'll use? Try the data calculator.
Daily plans
Best Korea Daily gives full-speed data up to a daily limit, then 128 kbps, which is only enough for messages. It can't be topped up.
| Per day | 5 days | 7 days |
|---|---|---|
| 500MB | ฿59≈ $1.95 | ฿89≈ $2.94 |
| 1GB | ฿99≈ $3.27 | ฿139≈ $4.59 |
| 2GB | ฿179≈ $5.91 | ฿249≈ $8.22 |
1GB a day for 5 days (฿99 (≈ $3.27)) costs about the same as one 5GB pot (฿109 (≈ $3.60)), and the pot lets you use more on busy days.
The T-Money card
LG U+ Unlimited comes with a free T-Money card when you buy 3 days or more. Collect it at Incheon (T1 or T2), Gimpo or Gimhae (Busan) airport. T-Money pays for the subway, buses and convenience stores. If you were going to buy one anyway, the gap to SKT shrinks.
Which one for your trip
Before you buy
See every length and buy on the Korea eSIM comparison.