Well from a quick check on web I have a Chameleon IHD and I do have SMETS 2 meters but I was told (by one of octpus's customer service people - though they are not consistent in what they say) it cannot cope with Go variable rates. I have had since mid-October and, while I can get gas meter readings on the web site the IHD does not show any gas readings - electricity only. It is also stuck on the pre Go tariff and standing charge rate and again I was told this is how it is. I assume this might explain billing problems as it looks as though, for some customers, Octopus are having to calculate and check billing at least partially manually and they are getting it wrong at times. As per my earlier post their marketing spin does not match their IT infrastructure and software.For the purposes of future thread following, might I suggest that posters annotate their posts with SMETS 1 or 2. The IHDs supplied with the two meter specifications are different. For example, I have a SMETS2 meter and Chameleon IHD, and I am on Octopus Energy’s Agile tariff with 30 minute tariff changes. The IHD only shows an approximate unit price of 10.64p. Actual charges are shown on the statement. I was told by Octopus that the Chameleon IHD cannot be configured for 30 minute time-of-use tariffs. Conversely, I think that I am correct in saying that the IHD can cope with the Go Tariff’s 2 rates.