background
Many people can't register, so they think about whether they can buy online and transfer a permanent free server from others. The seller will tell you that you can just change the email address directly, but it doesn't work.
reason
1. The backend of Oracle needs to bind a credit card. Without a credit card, it is easy to be blocked. As shown in the picture, you can unbind it, but please see the second article. 2. The
Oracle server will deduct money from time to time and then refund. This is called pre-authorization.
You can see It will deduct the money and then return the money, and it will check from time to time
How to prevent random deductions
My credit card is a visa of ICBC. I open the ICBC app and search for the overseas lock. The limit lock is
because Oracle uses the budget right to deduct money, so the overseas lock must be closed. Only open a limit lock, which is limited to 20 yuan, because 1. 38 Singapore is equal to about 14 yuan.
done~