International roaming gives your mobile service the capability to access overseas networks while you are travelling.
As a general rule, KISSMobile does not support international roaming due to the billing information taking several weeks. Simply because of the extremely high costs and we want to avoid customer's bill shock. The costs whilst you are using an overseas network are greatly increased and you also get charged to receive calls as well as making them.
It is normally far cheaper to get a local SIM when you are overseas. We strongly recommend that you get a local SIM in the country you're going.