If conditions permit, I like to use Apple Pay. In theory, NFC is the most secure. And you only need to press twice and touch Face ID. It is also very convenient online. Meituan, Didi and Duoduo all use this.

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I've been very happy with ClickDealer. They’ve been around for a while, and have some great offers that you usually can't find anywhere else. I would definitely recommend them to anyone!