Your paperclip reset should not have erased all the settings. It's never done that with my router. I'm glad that you were able to get a good connection to your iPhone after all that.
Oh dear, I spoke too soon. I find now that my 7 plus has dropped the connexion, while my wife's iPhone and iPad and this MacBook Air have all retained it. I have an appointment at Genius Bar tomorrow, so perhaps that will resolve this.