Have you been able to get the controller in the awaiting Wi-Fi state (quadrant 2 blinking yellow)?
If so, in that state, can you see a Rachio-xxxxxx network on your phone?
If so, can you connect to that network? (Of course it won’t have internet access).
If so, can it remain connected for two minutes (or does it switch to mobile data or another Wi-Fi network)?
If you have a Windows, Mac or Linux laptop or desktop with Wi-Fi, this post shows a way to get the controller connected to your network:
Wont work with iPhone 11 & iOS 13.4.0 Tech Support
If no luck, let us know what resources you have available:
- Android or iOS smartphones, whether or not they have an active SIM card, as long as they will power up and can connect to Wi-Fi. Post make/model/OS version.
- Android or iOS tablets.
- Windows, Mac or Linux laptop or desktop with Wi-Fi.
Which of these device(s) have you already tried in an attempt to connect?