Automatic disconnection after connecting OTG, you can try the following methods to operate:
One, unplug the OTG cable and re-insert it.
II. It is recommended to try a different OTG cable.
Three, replace other external devices (e.g., keyboard, mouse, etc.).
Four, into the phone settings - more settings - restore factory settings - restore all the settings (this operation will not delete the data in your phone).
Steps:
1, in the cell phone desktop to find the settings
2, into the settings to find more settings
3, into the more settings to find the restoration of factory settings
4, into the click on the restoration of all the settings to try