Why can't Coolpad y80d4g phone answer the phone and send and receive text messages in Korea?

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Hello: Because the mobile phone has not been tested abroad, there is no guarantee that your mobile phone can be used normally abroad, but in theory, the network frequency band is the same, and the communication function can be realized. We will tell you the network frequency band of the mobile phone (card1:TDD LTE: b 41(2600)); FDD LTE:b 1(2 100)/B3( 1800)； CDMA: B0 (800) Card 2: GSM: B2 (1900)/B3 (1800)/B8 (900)), you should consult a foreign operator. If someone tells you, you can, but you can't.

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