korean number is a must for delivery
Seeing some posts saying you need a korean 010 number to reserve restaurants in seoul, I want to share some of my understanding.
Restaurants:
CatchTable global works with just an email and foreign credit cards for most tourist-heavy spots. If there’s a tablet queue at the door, look for the global QR option. Tabling (mostly local bbq spots) still requires 010 number verification, but for standard tourist itineraries you honestly don't need a local number.
Food Delivery (where you actually hit a wall):
If you're staying more than a couple of weeks in an airbnb and want to use baemin or yogiyo at night, that’s where data-only esims fail. These apps require an incoming 010 number to receive an sms verification code just to finish account creation. No number = locked out of the delivery apps.
If you actually care about ordering delivery, get a carrier prepaid esims (the official lg u+ one has an incoming 010 option that receives sms fine). Just note that it won't pass strict identity verification for korean banking apps (still need an ARC for that), but it handles app signups and kiosk sms with no issues.
TL;DR: 1-week hotel trip eating out? Cheap data-only is fine. Staying a month+ and want late-night baemin delivered to your door? Grab an esmin with an incoming 010 line.