Here’s how to set the APN for the KT network, delete your profile, and reset the APN to your iOS device’s default settings.

1. Do KT APN Setting
* Power off > Switch SIM > Power on phone
* Tap Settings app
* Turn Off ‘Airplane’ and ‘Wi-Fi’ Mode
* Choose Cellular

* Turn On ‘Cellular Data’ Mode
–Tap ‘Voice & Data’
–Tap ‘LTE’ item

* Reboot your phone. Mode

Here’s how to set the APN (Access Point Name) for the KT network and reset it to your default network settings on an Android phone.

1. Do KT APN Settings
– Power off > Switch SIM Card > Power on phone
– From the Home screen, Tap Menu, then Settings
– Do following APN/MMSC Settings.
– Tap ‘Connection’ > ‘Mobile Networks’ > ‘Access Point Names’

– Turn on ‘Mobile Data’,
– Tap New APN (‘Add’) in right top line.

– Enter the following data.
– Name : KT
– APN : lte.ktfwing.com
– MMSC : http://mmsc.ktfwing.com:9082
– MCC : 450
– MNC : 08

– Save APN Value and Reboot your phone.

2. How to Fix ‘MMS won’t download’ issue.
– Tap APN type field.
– Change value : default –> default, mms, supl, wap
– Save APN Value and Reboot your phone.

– Save APN Value and Reboot your phone.