我用信用卡买了一个新手机。
wǒ yòng xìnyòngkǎ mǎi le yígè xīn shǒujī 。
I bought a new phone with my credit card.
如果你的信用卡丢了，请立即联系银行。
rúguǒ nǐde xìnyòngkǎ diū le ， qǐng lìjí liánxì yínháng 。
If your credit card is lost, please contact the bank immediately.
她的信用卡有很多积分，可以兑换礼物。
tāde xìnyòngkǎ yǒu hěnduō jīfēn ， kěyǐ duìhuàn lǐwù 。
Her credit card has many points that can be exchanged for gifts.