Chica, yeah it's good to have 2 SIM cards
I have 2, first one is so cheap in Finland and the other one is cheap abroad and my girlfriend can send free SMS to it. They have a deal with Vodafone, so it works nicely in Spain. I keep the "extra" SIM card under the back cover of my phone, between the battery and the cover of course it doesnt fit like that in all phones, but most Nokias and who would use other than Nokia

I once saw a cover for the 3310 noikia style phones that had a switch on it so you could switch SIM cards without having to open the case. I think I saw it in El Corte Ingles. BTW I should correct my last post, sending chat messages and sending regular messages are the same price.