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Frequently Asked Questions
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- Common
- USIM
- eSIM
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Can I make calls with an eSIM?
The call availability depends on the eSIM type! Please check the product information before purchasing. -
When should I install the eSIM?
USIM Store provides the optimal installation time in the voucher for customer convenience! Please check the voucher information before installing. -
How do I install an eSIM?
You can install it by scanning the QR code in the USIM Store voucher with your smartphone or entering the activation code. The detailed installation method varies depending on the device OS and eSIM type, so please check the links below for more information.
- Data-only eSIM installation guide
- Voice/SMS eSIM installation guide -
If I replace the USIM, will the address book and installed APP disappear?
Even if you replace the SIM card, your address book and previously installed apps will not disappear.
The reason is that most data storage locations are designated as smartphones, so even if you replace the SIM card,
The data will remain on your smartphone.
However, for some users, the storage location of data such as address book, some APPs, music, videos, etc.
When designated as a SIM card or a separately installed SD memory card, etc.
If you replace the SIM card or remove the SD memory card, you will not be able to check the information.
It would be helpful to note that you can check again when reinstalled. -
What is Call Forwarding Service?
Call Forwarding Service calls voice calls to mobile phone numbers used in KoreaIt is a convenient service that can be connected even when using overseas USIM.