How to delete all messages of Tianyu old man-machine at one time

Select and press the Enter key to delete.

Press the middle button to find the information, search the inbox, press the middle button to confirm, press the left button of the mobile phone to select the information to be deleted, and press the key below the middle button to delete one or all. Mobile phones can be divided into smart phones and non-smart phones. Generally, the performance of smart phones is better than that of non-smart phones, but non-smart phones are more stable than smart phones. Most non-smart phones use the CPU of British ARM company just like smart phones.