Prepaid Sim showing disconnected

[robquads]

I'm trying to get my prepaid sim working in my huawei r216R216 Mifi device. 

My SIM is on the "B Sim 24m 100GB £32 5G" plan. The device is showing that its getting a signal and I can see my number but its "disconnected" and not connected to the internet but its getting SMS through OK as I can get validation messages 

I've added the SIM to my ee account and it all looks fine. Is there something else that needs to be done to active a sim?

[XRaySpeX]

It's not a PAYG SIM as it's on a contract plan. 

[robquads]

? I said it was a prepaid SIM not PAYG. Its a 6 month contract prepaid up front.

[XRaySpeX]

OK but it's conventional to use "Prepaid" for PAYG. Yes, you do prepay your regular monthly contract subs but any extras outside your allowances are postpaid.