I officially bought my mobile phone in JD.COM. I discussed it with the merchant, ordered a refund, and then chose to add when I bought it again.
AC is the abbreviation of apple AppleCare service, which is a service to extend the warranty period of products. It can be said that it is very valuable and is the best choice for loyal Apple users. Once there is a problem and you want to repair it, you can save a lot of money.