When you are at the airport and wanting to pay via a kiosk for checked or excess baggage a phone could make more sense than a credit card.
当你需要在机场柜台支付托运或者超重行李的费用，使用手机进行支付比信用卡更合理。
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Meanwhile, two thirds of travellers (64 percent) do not know what their free-baggage allowance is across the major carriers, whilst 77 percent are unaware of what the differing card-payment fees are.