Smsmemoryfull how to clean up old man-machine

Smsmemoryfull's method of cleaning up the old man-machine is as follows:

Open the old man-machine and enter the SMS menu. Then, select the "SMS Settings" option, and then select "Clear SMS". In the option of clearing SMS, select "Clear all SMS" and confirm the clearing operation. Finally, restart the old man-machine, thus completing the cleaning of the SMS memory.