1. If you want to connect the computer successfully, you must ensure that the USB cable of the mobile phone is intact and can be used. If it is a USB cable problem, how to connect the computer? If the usb cable is broken, you just need to try another usb cable.
2. If there is nothing wrong with the usb cable, make sure that the USB interface of the computer is intact and see if there is any poor contact.
3. If there is nothing wrong with the usb cable and the usb socket of the computer, you should make sure that the interface of the mobile phone is intact and see if there is any poor contact. At this time, you just need to plug in the charging cable of your mobile phone to see if it can be charged.
4. If there is nothing wrong with the usb cable, computer usb socket and mobile phone interface, it may be that the computer connection mode of your mobile phone is set to "charging only" (the default is "charging only" if the mobile phone is not unlocked).