If this is possible, can someone provide step by step how to do this. I have spent a couple of hours attempting to add this and change the order and nothing seems to work out as one would expect.
There seems to be a number of mandatory fields that I have no idea how to fill in.
I have reached out to Teltonika directly a couple of times on the online form on the website with zero response.
Yes, setting up your RUT241 to use a WiFi hotspot (e.g. your phone) as a failover for its mobile WAN is officially supported, but it must be configured through the WebUI (not the RutOS app).
Set Up WiFi as WAN (Wireless Client Mode)
Navigate to: Network -> Wireless -> SSIDs
Press Scan
Select your phone’s SSID, click Join Network
Enter WiFi password
In General Setup:
Set Mode = Client
Set Network = wan2 (or create a new one named e.g. wifiwan)
Click Save & Apply
Configure WAN Interface for WiFi Client
Go to: Network -> Wan
Locate your new WiFi client interface
Press Edit
In Protocol: choose DHCP
Under General Settings, confirm:
IPv4 assignment Automatic (unless static needed)
Save & Apply
Enable Failover and Prioritize Mobile as Primary
Go to: Network -> Failover
You will see all WAN interfaces listed (e.g. mob1s1a1, wifiwan)
Change the priorities of your interfaces and enable the failover function for them.
Click Save & Apply