TravelSim is offering exclusively for the ISIC cardholders 60% discount on SIM cards with airtime plus a free mobile phone that hides callback and supports 2 SIM cards (plus free shipping!). TravelSim is a prepaid GSM SIM card, made for using when traveling abroad, with exceptionally low rates on outgoing calls and free incoming calls in over 135 countries. Simply insert the TravelSim card into an unlocked GSM phone and call away!
