1. The iTunes APP STOR can be bound to VISA and MASTER. If there are no these two marks, that is, only the UnionPay one is not available now

2. I just started to bind it. Sometimes, I am a little scared, but don’t be afraid, it has not been stolen so far

Every time you buy something, itunes itself will pop up a password box of its own

After binding, I forgot to deduct a few dollars. This is a verification process and will be automatically refunded next month

3. There is no limit on the amount you can spend on purchases, as long as it does not exceed the limit of the credit card itself