Do I have to pay more to use the HD voice for KT?
Or is there a data deduction?
825 2016-06-14 Gentleman
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http://product.olleh.com/wDic/productDetail.do?Ite...
Looking at the link above, I don't think there's an additional charge.
Usually, they call on 3G, but in the case of HD voice, they simply call on LTE.
So you don't have to sign up separately and it doesn't cost data.
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