The SIM Card can only be used for data, not for calls. The 30 day period starts with first usage, so you can order it in advance.
With this SIM card you can NOT use the "personal Hotspot" functionality many phones offer.
European prepaid sim card with 750 MB mobile internet & 300 free minutes to whole of Europe. Bundle valid for 30 days as of preferred date for activation.
For additional € 10 you can get a package with 1.25 GB.