To suspend a SIM Card you need to do is the following.
Navigation: Self Service – Add/Remove Bars
Step 1: Activate both slide bars – Next
Step 2: Activate the slide bars, for the SIM cards you want to suspend – Next
Hint: By pressing the button marked in red you can invert the whole selection of cards.
Step 3: On the next page you can review all details of the changes you are about to make, if everything is ok – Confirm & Complete
Hint: Like in Aspider a suspended card still produces the monthly recurring charges and still count towards the data pool, just any data usage is permitted.