The reset button is located on the back of the router.
Use a sharp tool eg. paperclip or a pen to press the button.
Press and hold the button for 20 seconds, the router will restart and reset to the factory settings.
Note! After MoFi MOFI3500-3GN has been reset, all settings that apply to the connection and the network must be reconfigured. After resetting, the router will restart. On initial start-up, the factory settings are recharged and the computer loses connection to the router for about 30 seconds. You can then login the setup interface of the MoFi MOFI3500-3GN router and reconfigure the network.