I have a number of mifis, one of which just died and I'm replacing it with one I bought a couple of months back.
The replacement was tested at the time I bought it, using the SIM I've taken from the dead device, and worked perfectly.
Now, when I connect to the mobilewifi link (or 192.168.1.1) to check all the settings, they are all as they should be. (Right APN, username, logon etc)
And I've checked with Orange that the SIM is still valid and live on my account. It is.
They have no idea why the message:
"Connection failed. Network access is not allowed. Please contact your service provider."
is coming up. And nor do I.
Anyone here got a clue?