Connecting sonos to iphone wifi hotspot

I recently moved to a rural area where a cellular hotspot is my only connectivity option. I have read all the threads related to this topic but have had no success. Here is what I have tried:

1. Turn on iphone hotspot on phone 1
2. Connect to this hotspot on phone 2
3. Launch Sonos app on phone 2
4. Wait for "let's fix it" message to pop up and click on it
5. Did I change router or network settings → yes
6. Do I want to add a trusted network to Sonos → yes
7. Click on "find system"
8. Get message "we couldn't find a Sonos system on this account"
9. Unplug my Play 1
10. Plug it back in holding play button until it flashes white and orange
11. Release button and it flashes green
12. Repeat steps 4-7
13. Same result
14. Swipe right to find "Add your Play:1 - estimated time - 5 min"
15. Sign in with user name and password
16. App is up to date → continue
17. Add to an existing system? → No, create a separate system
18. Join to temporary network with a long randomly generated name
19. Plays a series of chimes
20. Make sure light is flashing white and green → check
21. Now let's add your Play:1 to <my neighbor's wifi>
22. Change network
23. I don't see my network
24. Adjust router settings (I don't have a router)
25. Alternatively, choose "other network" and type the name of my wifi hotspot
26. We could not find this network. Try rebooting your router (I don't have a router)