Users in South Korea can check for updates on your device if the CU Reference is 6050W-2XKLKRC(“X” can be any letter). This update will improve user experience and product performance. Meanwhile it will keep your personal data.
if there is no update found on your device, it means your phone software version is up to date.
How to check the CU Reference of your device?
You can check the CU Reference by accessing into menu-> Go to “Settings” -> “Regulatory & Safety” -> “CU reference”