yes it has a reset network setting which i have also tried at least three times , i have noticed that it asks for a password , but i do not have any passwords for it other than that which is on the bottom of the router which i have tried , and as stated it has nothing to do with the home router , so i'm a bit bamboozled as to what it means by "password"
Does your camera have a screen under the wifi menu to reset network settings? My d7200 has it. Try that. I just got a new phone, so I am getting re-familiar with this tonight. No password was needed, the phone just connected to the camera's wifi without issue. It just comes up as an unsecured network and I connected. So maybe try the reset network connection menu in the camera if you have it on your camera.