How to restore the current limit?

We need to operate (3 steps) how to restore the traffic limit. The model of this demonstration is Xiaomi11pro; System: MIUI12.5; ; The following are the detailed steps:

1 Click the plus sign.

Open the message and click the plus sign;

1. Click the plus sign 2 and enter 100 10.

Enter10010 at the receiving end after entering the page;

2. Enter 100 103 and click Send.

Enter KTBXLL in the message content and click send.

3. Click Send