Is the speed of traffic consumption doubled?Consume quickly
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1 KRW for every 1 hour. It’s around 0.64 USD per 1 month (as 720 hours)
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90 KRW per 1 GiB by up/download
So you’ll get charged around 35 USD by 400G Traffic per 1 month (720hours + 90KRW * 400GiB = 36720KRW)