I’d like to go through your workflow and confirm a few things:
- Both of your RS+ can’t connect to the Wi-Fi broadcast from the router.
- Can you confirm that the Wi-Fi network is using a 2.4GHz band?
- Have you tried another Wi-Fi network?
- Both of your RS+ can’t connect to the mobile hotspot except one LG phone.
What was the mobile platform of the other device you checked? iOS or Android? We have a support tip on what to check if you can’t connect Reach to the internet via a mobile hotspot.
- When you try to add a network again, it doesn’t appear on the Available screen in the Emlid Flow application.
What happens when you try to add a hotspot or Wi-Fi manually?
P.S. I’ve also deleted your answer with a Full System Report as it contains sensitive information.