Country Lock — Check and Unlock

What Is Country Lock?

A country-level lock Korean carriers (SKT, KT, LGU+) apply to devices. Once you land abroad, the device blocks foreign carriers, and your travel eSIM stops working.

• Usually applied within the first 90 days after activation
• No effect inside Korea
• Symptoms only appear after going abroad

Find Your IMEI

iPhone

Settings > General > About — note the IMEI (15 digits).

Android

Settings > About phone > Status > IMEI — or dial *#06#.

How to Unlock

1. Call your carrier

Carrier	Number	Ask for
SKT	114	"Country lock release"
KT	100	"Country lock removal"
LGU+	101	"Device unlock"

You must be the registered subscriber.

2. Register / verify IMEI

Some carriers require entering the IMEI as part of the process.

3. Turnaround

• Immediate up to 24h depending on carrier
• Restart the device after release

If You Can't Unlock

• Outside contract: Usually auto-released after contract ends or 90 days
• Under 3 months new line: Some carriers refuse during the first 3 months
• Lost/stolen flag: Carrier branch visit required

After Unlocking

Follow iOS Install or Android Install.

If foreign carriers still don't appear, check the manual network selection step in Troubleshooting.