How do I call KT Customer Center with LG mobile phone?

pu1. If it's KT, you can call 100 without a national number

2017-12-06

OK

pu2. I think you can answer 1Boo only on a landline. If you're calling for free on your cell phone, you can call 080-080-1618 here

2017-12-06

OK

pu3. It's the simplest if you borrow a phone from someone who uses KT

2017-12-06

OK