How does the old machine delete information Providence?

Do you want to ask the old machine how to delete information? The steps are as follows:

1, press the key in the upper left corner of the phone to prompt Bluetooth; Press the middle key to prompt the phone book, and continue to press the key to prompt the information.

2. Press the middle button to confirm, find the inbox, press the middle button to confirm, and then press the button in the upper left corner of the phone.

3. Select the information to delete, and press the middle button to delete one or all information.