Good day Three days ago, I bought a ZTE U50 mobile router from you that was returned. As this device was previously used by another customer, I cannot access the router's system web page via 192.168.0.1 and log in. I get the message "Wrong password" This is most likely because the previous owner changed the password. Is there a way to reset the device to the factory settings? I have not found any instructions for this on the manufacturer's website or in the Quick Start Guide Thank you very much and have a nice day Christoph Wolf