Speedily soaring interest charges are usually unwelcome news for telecom firms carrying loads of personal debt. This means upcoming promotions and/or credit card debt refinancing may be costlier. K?t Qu? X? S? K?t Qu? X? S? Mi?n Nam K?t Qu? X? S? Mi?n Trung K?t Qu? X? S? Mi?n B?c KQXS Các