South Korea APN settings

In short

For SK Telecom, set the APN to 5g.sktelecom.com and leave the username and password blank. Below are the mobile data settings for all 3 carriers in South Korea: SK Telecom, KT and LG U+. Tap a value to copy it, and open the MMS settings if picture messages fail.

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Updated 1 October 2026 · SimVala editorial

3 carriers in South Korea

SK Telecom APN

5g.sktelecom.com

Username and password: leave blank

APN settings for each carrier in South Korea

Checked 2026-10-01

SK Telecom APN settings

From SK Telecom Own network in South Korea450-05

APN for mobile data

5g.sktelecom.com

Name: SK Telecom
Username: Leave blank
Password: Leave blank
APN protocol: IPv4/IPv6
MCC: 450
MNC: 05

A 5G phone uses 5g.sktelecom.com (name SKT 5G), but uses lte.sktelecom.com if you are on an LTE plan.

Manual iPhone APN entry (lte.sktelecom.com) is only documented for older iPhones.

Other APNs

LTE phones and tablets
lte.sktelecom.com
Name it SKT LTE. A 5G phone on an LTE plan also uses this.
3G phones and tablets
web.sktelecom.com
The MMS proxy is smart.nate.com.
LTE modems
lte-internet.sktelecom.com

Picture messages (MMS) settings›

MMS APN: lte.sktelecom.com
MMSC: http://omms.nate.com:9082/oma_mms
MMS proxy: lteoma.nate.com
MMS port: 9093

KT APN settings

From KT Own network in South Korea450-08

APN for mobile data

lte.ktfwing.com

Name: KT
Username: Leave blank
Password: Leave blank
MCC: 450
MNC: 08

KT gives a different APN for each Android generation. Phones from other brands or overseas are not checked by KT, so data may not work.

iPhones set up automatically when a Korean KT USIM is inserted.

Other APNs

Android 5G phones
internet
Android LTE with VoLTE (HD Voice)
ims.ktfwing.com
Android 3G (WCDMA)
alwayson-r6.ktfwing.com

Picture messages (MMS) settings›

MMS APN: lte.ktfwing.com
MMSC: http://mmsc.ktfwing.com:9082

LG U+ APN settings

Cross-checked Own network in South Korea450-06

APN for mobile data

internet.lguplus.co.kr

Name: LG U+
Username: Leave blank
Password: Leave blank
APN type: default,mms,supl,fota,cbs
MCC: 450
MNC: 06

Other APNs

LTE roaming
lte-roaming.lguplus.co.kr

Picture messages (MMS) settings›

MMS APN: internet.lguplus.co.kr
MMSC: http://omammsc.uplus.co.kr:9084

SimVala is not affiliated with, endorsed by or sponsored by any carrier on this page. Logos belong to their owners and are shown only to help you find your carrier.

Carriers in South Korea

From the carrier's own pages

With MMS settings

Need a username

South Korea APN settings at a glance

The main internet APN for every carrier in one table. The cards above have the full settings, other APNs and the MMS values.

Carrier	APN	Username / password	MMS	Network
SK Telecom	5g.sktelecom.com	blank	Listed	Own network
KT	lte.ktfwing.com	blank	Listed	Own network
LG U+	internet.lguplus.co.kr	blank	Listed	Own network

Mobile data in South Korea: what to know

All 3 carriers on this page run their own network. Each one has its own APN, so make sure you copy the settings for the carrier named on your SIM, not the one with the best coverage.

None of the carriers in South Korea need a username or password. Leave both fields empty: typing one where none is needed can stop data from working.

All 3 carriers list separate settings for picture messages (MMS). If texts work but photos in messages do not, those are the values to check. SK Telecom, KT and LG U+ also have a second APN for some plans or devices, shown on their cards.

The carriers here use the mobile country code 450, the first three digits of every network code in South Korea. Android usually fills in the MCC and MNC from the SIM, so you rarely need to type them.

Visiting South Korea with your own SIM? Keep your home APN: roaming data still goes through your home carrier. You only need these settings with a local SIM bought in South Korea. Or skip the SIM shop with a South Korea eSIM, which sets its own APN.

How to change the APN

iPhone

Open Settings, then Mobile Data (Mobile Service or Cellular in some regions).
Tap Mobile Data Options (with two lines, tap the line first), then Mobile Data Network.
Type the APN, username and password into the Mobile Data section.
Go back. The change saves by itself.

No Mobile Data Network option? Your carrier locks it, and the iPhone sets the APN for you.

Android

Open Settings, then Network and internet (Connections on Samsung).
Tap SIMs or Mobile networks, pick your line, then Access Point Names.
Tap + or Add, and fill in the fields shown above for your carrier.
Save from the menu, then tap the new APN so it is selected.

Made a mess of it? Reset to default in the same menu brings the original settings back.

Still no data in South Korea? Check these

Data and roaming on
Mobile data must be on, and airplane mode off. On a local SIM, data roaming can stay off.
The APN, letter for letter
For SK Telecom that is 5g.sktelecom.com. One wrong dot or capital is enough to block data.
Username only if listed
No carrier here needs one. Clear the fields if an old value is still there.
Select it and restart
On Android, tap the entry so its dot is filled. Then restart the phone and open a website.

APN settings near South Korea

All 34 countries

Calls and texts work, only data does not? That points to the APN, because calls and normal texts do not depend on it. If nothing works at all, the SIM itself may not be active yet: ask the shop or the carrier.

More free tools

All tools

Sources

Each carrier card names its own sources. Checked 2026-10-01.

South Korea APN settings, answered

What is the SK Telecom APN?+

The SK Telecom internet APN is 5g.sktelecom.com, with the username and password left blank. Some plans use a different APN, listed on this page.

What is the KT APN?+

The KT internet APN is lte.ktfwing.com, with the username and password left blank. Some plans use a different APN, listed on this page.

What is the LG U+ APN?+

The LG U+ internet APN is internet.lguplus.co.kr, with the username and password left blank. Some plans use a different APN, listed on this page.

Which carriers in South Korea need a username and password?+

None of the 3 carriers on this page need one. Leave the username and password fields blank.

Do I need to set an APN in South Korea?+

Usually not. Your phone reads the APN from the SIM and sets it for you. You only need to add it by hand if mobile data does not work, often after moving a phone between networks or on an unlocked import.

I am visiting South Korea. Should I change my APN?+

Not if you use your own SIM: roaming uses your home carrier's APN. You only need the settings on this page if you buy a local SIM from a carrier in South Korea.

Will a wrong APN break my phone?+

No. At worst, mobile data or picture messages stop working until you fix it. On Android, Reset to default in the APN menu puts the carrier's own settings back.

Visiting South Korea? Skip the local SIM

A travel eSIM installs before you fly and usually sets its own APN. Pay in crypto, no ID, no email.

See South Korea eSIMs All APN settings