I don't know what the admin think, but due to the issue arising on both Stagecoach and Go North East with regards to WiFi, would it be better having a general WiFi issues thread in the "Off-topic bus chat" area?

There's potential for a few things to go wrong with the Moovbox. If you search for networks and can't find anything, then the power has either been disconnected or there's a dodgy connection. If you find the network name "Moovbox" it generally means there's a sim card fault, either it's broken or has came loose, or there's no sim card fitted. If you connect to a fully connected bus WiFI but can't load web pages, it's usually down to some inconsiderate twit streaming video or music on their device, using up most of the bandwidth, preventing other users accessing the service, or the Moovbox is receiving a low 3G/4G signal at that particular time. Of course there's things on the bus itself that could interfere with signals, something that should hopefully be overcome when an externally mounted signal receiver is released.
As for new buses, when they're ordered with WiFi the sim cards are sometimes ordered at the same time, with a planned delivery date/contract start date so they arrive between a bus being delivered and the day they're planned to enter service. If buses are delivered early and enter service earlier than planned, as was the case with Cumbria's Stagecoach Golds, there's a high chance the operator is still waiting for the sim cards to be delivered or for the contract start date where the sim cards will be activated by the network operator.