Although charging the phone with a usb socket will not directly harm the phone, it is also necessary to pay attention to some problems in the process of use.
The voltage of the usb jack is 5v, and the jack on the same board is 220V, when the usb jack is in use, it is easy to mix weak and strong current. Therefore, if you use the usb socket to charge the phone, you should try to avoid the use of other three or two holes.
Can't be sure. The charger is best used with the mobile phone, that is, with the mobile phone. The USB port on the socket is also a charger, but its output current is not suitable for all mobile phones. More than the current allowed by the phone will damage the battery, and less than it can only charge more slowly. Check out the USB instructions on this socket to make sure.