You need a replacement SIM card if:
You can obtain a replacement card from any Swisscom Shop. Ask the Shop staff to assist you with transferring the contacts from your old card / your old device to your new card / your new device.
iPhone and iPad save the contacts directly onto the device. The data does not need to be transferred from the old to the new SIM card.
Save your phone data and contacts on a memory card (e.g. Micro SD) or via a Google Account (for Android smartphones) or Microsoft My Phone (for Windows Mobile).
To transfer your contacts use the SMS client in the Unlimited Data Manager (UDM) or Unlimited Connection Manager (UCM). If your Connection Manager does not support SMS, you can insert the replacement card in a mobile phone and send the text via the mobile phone. Your current SIM card will be deactivated and the new one activated. Now install the new replacement card on the device.