What is HeidiTel?

HeidiTel provides low-cost international roaming in more than 200 countries. With HeidiTel, you get a new number and SIM card to put in your existing GSM (SIM card) handset to use while travelling.

How does it work?

HeidiTel is a prepaid SIM card that uses callback technology to save you up to 90% when calling and using mobile data. All you have to do is dial a number from your phone as usual. HeidiTel does the rest of the work by picking up your call, connecting it to the number you dialed and calling you back (thereby connecting the two ends of the line). Incoming calls are free in 200 countries, HeidiTel users can call each other for only 0,19 eur/min and calls within the EU are also only 0,19 eur/min


HeidiTel is more than just a SIM card. We offer a wide range of services that make staying connected as easy as possible, including:

  • Call Waiting – Have more than one conversation at a time
  • Data roaming – Use data abroad at affordable rates
  • Conference Call – Include up to 10 participants on a call
  • Call Redirection – Never miss a call
  • Multimedia messaging – Use MMS to share moments from your life
  • Cell ID – Find your phone using GPS, anywhere and anytime
  • Local number – Get a local number for your phone
  • Voicemail – Always be within reach



Email: support@heiditel.com

Official address
HeidiTel SA
Unterdorfstrasse 12
CH-8808 Pfäffikon SZ