On this page, you can place a webcall to any XXSIM for free.
Call as long as you want. It's free for the caller*
* If the XXSIM card is not called by its original number 00372…, additional EUR0.15/min will be charged from the called XXSIM balance. I. e. these EUR0.15 are charged when the XXSIM card is called through a toll free number, through SIP trunk, through webcall or through a national number