Check your current MB credit in your personal cockpit at cockpit.swisscom.ch.
The 500 MB data package is available for the following tariffs:
All prices in CHF including VAT
All prices apply to domestic usage
Is suitable for normal personal use. Swisscom reserves the right to curtail or restrict the service or take other appropriate steps if usage considerably exceeds normal levels, or if there are justified indications that the SIM card is being used for special applications (e.g. surveillance and machine-to-machine connections).