worked well for me 

Worked well for me

有電話號碼很放便，預約需要電話號碼,推推👍

首先，不需要再去領卡、換卡（當然要先確定手機型號可用） 在台灣先掃描了qrcode，飛機一落地，更換電信供應上立即可以上網。 在首爾人多的市區網速很順暢（用於查找地圖、定位為主），將前往江陵，屆時再試試。

本來是買另一張，在仁寺洞時突然變得很慢，甚至不能用，著急找路的我，當下用很慢很慢的網路買了這個esim，整個解救了我，先買先用，超級順暢完全不卡！

どこでも繋がるし、何も問題はありません。返却手続きも要らないし、便利です

Fantastic and easy to use. eSim red is with SKT, which is a top provider. I've used the eSim red 4 times now, and it has worked every single time. Airlo does not work well in Korea and is horrible. 

It was the first time I used the airport pick-up method. I arrived in Korea very late and there was still a dedicated person at the counter. The service was very fast.

After picking up the barcode at Incheon Airport, the scan was successful immediately. It was completed faster than expected. I am very satisfied!

Their price and service are really competitive and delivery speed is also fast as well

keep in mind that you need to register the sim with your id in order to use a phone # which can be used as an ID in South Korea within 30 days, but it won't begin actual usage period until you actually start using it in South Korea