I have (2) RUT955 and (1) RUT240 that will not provide data connection. I have an older firmware RUT955 that works with the same sim card (t-mobile US) that works fine. The units say the card is inserted, shows the T-Mobile operator, shoes the Operator state as registered (home), and after talking to T-mobile they can see the devices when I boot them up connect to the cell towers but still I get Data connection state 'Disconnected'. In Network interfaces is dhows MOB1S1A1 as running with an IP address.