I am getting the error:
There was an error adding your device: No device found with id 'nrf-352656100878829'. Verify you are passing a valid device id and not a device name. Also ensure that your device is powered on and its LED(s) indicate that it is connected to nRFCloud. If the LED(s) do not indicate a connection, there may be a problem with your device certificate. In that case, search Nordic DevZone for "certificate update" for a possible solution.
when adding my Thingy 91.
I think it is because there is no iBasis SIM connectivity in South Africa. Is that correct?
If there is how can I work out if there is connectivity in my particular area?
If not, how long before there is? Is there an alternative way to use the Thingy?