Help to find voip mobile operator

Hi, I am going to visit Switzerland first time.I will be there for 3 months and need any voip number to use on mymobile, which will not be very expensive to call to Spain and Portugal,also without any contract duration, so that I could cancel it wheneverI will leave. Please advice if you know any good idea. Thank you inadvance.

Welcome to the forum Sergio! I don't have any experience with voip services in Switzerland myself, but I suggest that you take a look at Switzernet (they allow non-Swiss residents to set up a prepayment account) and Skype. You may also ask Swisscom for further information.

Thanks a lot Annika.
I have contacted Switzernet, they really can provide me service, even I am non-Swiss resident. I can keep the number even after leaving Switzerland and use it from everywhere with same rates, if I'll need. Hope to have a great trip!

Glad to hear that you've found what you were looking for, Sergio. Have a wonderful stay in Switzerland!