Help centre

An eSIM works as a SIM in digital form, built into your smartphone. After you buy a plan, you receive an emailed QR code, and scanning it sets up the eSIM at once. It runs next to your current SIM, so your Korean number stays and you get data abroad at a fair price.

Most current smartphones support eSIM. Supported models include iPhone XS and newer, Galaxy S20 and newer, and Pixel 3 and newer. See whether your settings offer an 'Add eSIM' menu.

Yes. Your device has to be free of a carrier lock before an eSIM will work. Call your carrier, such as SKT, KT or LG U+, to check whether it is unlocked, or check it yourself in settings.

Yes, installing in advance is recommended. An eSIM plan only begins once you enable data roaming at your destination, so installing it early costs nothing extra.

Once you have bought a plan, use your smartphone to scan the QR code from the email you were sent. On an iPhone, open Settings > Cellular > Add eSIM. On a Galaxy, open Settings > Connections > SIM manager, then scan the code and follow the prompts to complete the installation.

Once the eSIM is installed, open the cellular settings and enable data roaming on the eSIM line. The phone then joins the local network by itself.

No. Each QR code installs on a single device only. Once installed it cannot be used again, so please take care. If you need to change devices, please contact customer support.

First, make sure your phone has a Wi-Fi connection. Installing an eSIM needs an internet connection. If it still doesn't work, restart your smartphone and try again, or contact help@yeohaengyusim.kr.

You can pay with Visa, Mastercard, Maestro, JCB or UnionPay cards or Apple Pay, and every payment is handled securely.

If the eSIM has not been installed yet (QR code unscanned), you can get a full refund. After the QR code has been used and the eSIM is on a device, a refund is difficult.

Please contact help@yeohaengyusim.kr with your order details. Once we have checked, we will refund the duplicate payment within 24 hours.

Yes. When you complete a purchase, we automatically email a receipt and order confirmation to the address you registered. If the email hasn't arrived, please check your spam folder, and if it still isn't there, contact customer support.

Make sure data roaming is on and the eSIM is chosen as your data line. Try switching airplane mode off and on again or restarting your smartphone. If it still doesn't work, search for networks manually in settings and select another carrier.

Speeds can slow down at busy times or in areas where the network is busy. Search for networks manually in settings and try switching to another carrier. On unlimited plans, speed may be limited once you pass a certain level of usage under the fair use policy.

Look in your spam or promotions folder. It is sent as soon as payment is complete. If you still can't find it, contact help@yeohaengyusim.kr and we will send it again right away.

An eSIM profile installs on a single device only. If the plan is still unused, customer support can help you get a new QR code.