Woori Mobile

Woori Mobile is a Korean MVNO that sends your eSIM via QR code directly to your email after purchase. Their 15-day plan costs $19 USD and provides 300MB daily data; once you exceed that daily allotment, speeds throttle to 3Mbps for the remainder of the day. Woori requires a 2-day pre-order and will ask for your passport information during checkout, similar to other Korean MVNOs targeting tourists.

This option fits budget-conscious travelers taking shorter trips who can plan ahead. The per-day data cap of 300MB works for light messaging and maps if you're selective, and 3Mbps is usable for browsing during off-peak hours, though video streaming will be slow. The low flat rate makes it an economical choice compared to higher-tier carrier plans.