@Paulgoonerboy: If you are seeing this notification when running Diagnostics in the Samsung Members app, and you do not have a SIM installed in the SIM2 slot, then please disregard it. While I understand that it might cause some confusion, the Diagnostics tool registers the absence of a SIM as an error, but this is simply due to the fact that it is unable to find a SIM to run its checks on.
