We have 2 basic piccell wireless flip phones from when daughters studied in Rome. I know that I can order Spanish SIM cards through Piccell Wireless, for about $29 each, and then we get charged a nominal fee per minute of use. Not really understanding this topic all too well, is it possible to buy another "brand" of SIM card from a shop in Spain that might be cheaper? We're just looking for a reasonable way to stay in touch with each other and have an emergency number for family members back home to contact us... Vodaphone or something like that? Or are SIM cards unique to each brand of phone? Figure we could always try to Bic phones, if this doesn't work.