Losing 2.4G internet connection
I use LTE routers to connect to 6 digital signs in different locations where there is no local wi-fi network. I set routers up to stay on (no sleep), 2.4 broadcast only,and a 2 GB limitation per month to match up with my data plan. For two months these worked fine. Now 5 out of the 6 are emitting a wi-fi signal but no connection to the internet. I have not exceeded data usage. Bill is automatically paid. Is there a set-up setting / process I have missed?