JamboSim eSIM Data Plans for South Korea

JamboSim does not provide a truly unlimited high‑speed data plan for South Korea.
The plans that carry the “Unlimited” label actually allow 3 GB per day and, once that quota is reached, the speed is throttled to 1000 kbps.

Customers who need more data can choose from JamboSim’s fixed‑data options, such as the 20 GB plan for 30 days at $10.99 USD, the 50 GB plan for 90 days at $37.99 USD, or the 100 GB plan for 180 days at $69.99 USD. These fixed data plans give larger allowances without the reduced speed tier that applies to the “Unlimited” names, and they may be more cost‑effective for heavy data users.

Yes, JamboSim sells eSIM plans that include a phone number and SMS capability in South Korea. The available options range in price from $11.99 USD for a 1GB/7‑day plan up to $101.99 USD for a 20GB/365‑day plan, with validity periods between 7 days and 365 days. Each plan uses a phone number with the dialing code +1, allowing outbound voice calls and outbound SMS messages only; incoming calls and SMS are not supported. Travelers who need specific call or messaging features should confirm details directly with JamboSim before purchasing.

JamboSim offers 12 single‑country data plans and 33 multi‑country plans that include coverage in South Korea. The single‑country plans range in price from $1.99 to $99.99 and provide data caps between 200 MB and 100 GB, while the multi‑country plans follow the same price and data ranges but allow use across several destinations, with the same 3‑ to 365‑day validity range. These plans also offer the option of daily data caps in 12 cases, and a fixed data cap in 33 cases, both with tethering allowed and a reduced speed cap of 1000 kbps.