Please go to the [Me] page and tap [Have a code] icon, enter the activation code.
Then you can associate with the guard plan to the camera.
If the device isn’t associated with any plan, the code will take effect immediately ;
if the device is associated with a plan which is not automatically renewed, the code will take effect after the current plan expires;
If the device is associated with a plan which is automatically renewed, you cannot use a code until you disassociate it from this plan or you cancel your auto-renewal subscription. Please enter the web client to cancel the auto-renew Cloud Service plan.