Is it true that Unicom's satisfaction survey sends phone bills?

I had a similar experience, and the customer service explained to me that the monthly gift is calculated from the month after the business is handled. I guess you too. However, when I was doing business, the salesperson of Unicom didn't explain this to me, so the first month was particularly large, and the refund for next month will be credited to the account next month.

For example, you can open an account in the business hall at the beginning of July, and set up a monthly gift package for 6 yuan in advance, so that you can't enjoy the gift discount in July, and the gift fee for 6 yuan in August can't be found until after September 4.