Hi aspen,With the troubleshooting that you have done to get your Wi-Fi to work on your iPhone, the next thing would be to restore it. Take a look at the article below to compare what you have done already to make sure you aren't missing anything as far as troubleshooting this.
If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi networksupport.apple.com/en-us/HT2... a good day