top-up card

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++ˈtop-up ˌcard noun [countable]  a card that you buy in order to be able to continue using a pay-as-you-go mobile phone 手机充值卡From Longman Business Dictionarytop-up cardˈtop-up card a small card or piece of paper you can buy which increases the amount of time that you have for making calls with your mobile phone → card

ˈtop-up ˌcard nounChineseSyllable  

order card you buy a that to in Business

top-up card
ˈtop-up ˌcard noun [countable]
a card that you buy in order to be able to continue using a pay-as-you-go mobile phone

top-up cardBrE /ˈtɒp ʌp kɑːd/ 🔊NAmE /ˈtɑːp ʌp kɑːrd/ 🔊 nouna card that you buy for a mobile/cell phone so that you can make more calls to the value of the card 手机充值卡