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How to choose SKTT mobile phone mode and LG mobile phone?

SKT, KTF and LGT are the three major telecom operators in South Korea, just like China Unicom, China Mobile and China Telecom in China.

SKT mobile phone (high-end call quality)

KTF PCS (average call quality)

LGT-PCS (poor call quality, poor signal)

Finally, SKT, KTF and LGT can use their mobile phone numbers to transfer money to each other.

For example:

If you have been using SKT Communication Bureau for more than 3 months, you can convert it into a cheap phone bill package of KTF Communication Bureau.

Of course, you don't have to change your mobile phone number.