You provide DevKit edition of some of your products. What is it?
We generally don't sell any Sigfox connectivity.
In order to speed up testing and Sigfox onboarding, you can purchase some devices in a DevKit edition for testing integration into your platform and projects. It is valid only for one year, cannot be prolonged (only replaced by commercial connectivity) and cannot be used commercially. It includes Platinum tier with Atlas location services and international roaming. It does not include the WiFi Atlas option.
You can also use DevKit subscription with the IOFrog.com platform, just proper callbacks (described in the documentation) need to be setup.
For DevKit activation after purchase, register the device first here: https://buy.sigfox.com/activate.