Thank you for reaching out to us here in order to find out the missing SIM card manager on your Samsung Galaxy Z Flip 3, which was bought in South Korea.
We really understand your requirement, as you've said here that you are traveling and it's essential to have both SIMs working whenever you need them. Don't you worry; we are here to assist, guide you and offer solutions to your problems.
Depending on your smartphone, it will either come with a dual SIM or a single SIM tray. Dual SIM models allow you to use two SIM cards in one device. This is handy if you have separate phone numbers for work and home or if you would like to use a local number while keeping your original number active when in a foreign country.
Before you try out the recommendations below, be sure to check if your device's software and related apps are updated to the latest version. To update your mobile device's software, follow these steps:
Step 1. Go to Settings > Software update.
Step 2. Tap on Download and install.
Step 3. Follow the on-screen instructions.
Supposedly, your Samsung Galaxy Z Flip 3 has Nano-SIM and eSIM card capability. And Dual SIM's are supported by the carrier, and you will need to contact the customer service of your Mobile Network Service Provider in order to enable them.
For more assistance and guidance, you may contact us via our online Samsung Customer Care support channels below.
