What is the shielding method of attachment SMS of Tianjin Unicom?

Tianjin Unicom's attachment SMS shielding method is as follows: 1. Only subscription members will receive the experience SMS sent by 10655 188. Receiving the experience SMS is free and the forwarding fee is not cancelled. If you don't want to receive any more, you can cancel your subscription by SMS: edit 00000 and send it to 10655 188. 2. 10655 188 The notification message sent by the system cannot be cancelled: in order to make it clear that the calling party and the called party are using the attachment message, the system comes with a notification prompt, and if you don't want to receive this prompt, you can stop forwarding the attachment message. When forwarding or receiving the attachment message, the called user first receives the text message and then receives the voice after an interval of 3 or 5 minutes. When the voice hangs up, the system will send the following notification message to the calling party: Sender: "The attachment message you sent to 13XXXXXXXXX has been successfully sent, and the information cost is X yuan. You can get wonderful content by replying to M.