On February 28, 2022, the post office deducted the SMS service fee. Is it free in 2022?

It's free. If you subscribe to SMS for one year, you will be charged after one year.

SMS reminder starts this service from balance change reminder. Banks charge service fees, and customers can choose to customize them monthly or annually. In order to facilitate customers to customize SMS reminders, it will be automatically extended. After the expiration, it will be deducted directly from the bank card without going to the bank outlet.