What do you do when you shut down your phone and erase everything and try to connect to Wi-Fi but no name pops up and you try to enter Wi-Fi domain but it still won't work

If you still can't activate, here's how to activate your iPhone through iTunes instead:

1. Make sure that you have the latest version of iTunes.
2. Check that your computer has an Internet connection.
3. Open iTunes on your computer. With the cable that came with your iPhone, connect your iPhone to your computer.
4. Wait while iTunes detects and activates your iPhone: 

• • If iTunes shows, "Set up as New" or "Restore from Backup," it means that iTunes activated your iPhone. 
  • If an error in iTunes says that the SIM card isn't compatible, contact your carrier.

https://support.apple.com/en-us/HT201407