Talk about whether Xiaomi mobile phone needs to add SMS cancellation function.

Personally, I think it is unnecessary. First of all, the principle of SMS cancellation function is to delay sending SMS, so that users can cancel sending within a period of time. Doing so will reduce the immediacy of sending short messages (because operators do not provide this service, it is impossible to send them to other people's mobile phones and then withdraw them). At the same time, this function is not needed by everyone. Compared with the fact that everyone is using various chat apps now, if it is suggested to increase, the priority will be very low in miui development.