I use iPhone Xs Max, but sometimes I can't get on the phone because it says no service. Why is that?

I bought iPhone Xs Max this time

Sometimes it doesn't work because the service is not available. I've been using KT for a long time, but it hasn't been like this for a long time.

It's not only when the phone is off, but it doesn't work.

If I wait for less than 10 seconds, the antenna pops up again

1557 2018-11-13 Gentleman

A. 1

I'm having a hard time with this, but I don't know how
I do that about 10 times a day
Even though I don't have anything to update after using the latest 12.1
I'm using iPhone X

Gentleman 7 years ago 0

A. 2

Isn't it the carrier's problem?

Gentleman 7 years ago 0

A. 3

I use U+, but you use KT, so I don't think it's a problem with the telecommunication companies

Gentleman 7 years ago 0

A. 4

I often had that problem with iOS before, but I haven't had it since I updated it to 12.1

Gentleman 7 years ago 0

A. 5

I don't think it's about the device or the carrier
Maybe it's not even an Ios problem

Gentleman 7 years ago 0

A. 6

I use iPhone 8 for SK, but there is the same problem

Gentleman 7 years ago 0

A. 7

I live in a foreign country, but I have the same problem using it here
I think it's an iPhone problem

Gentleman 7 years ago 0

A. 8

I think it's an ios problem

Gentleman 7 years ago 0

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