Hi all.
I need read and write (via Arduino) the contents of a SIM card to backup or just check the data stored. anyone knows how to help me? 
Thanks
Do you have the required hardware (the sim card reader)? Do you have a datasheet for it? Do you have it hooked up correctly?
What problem are you having?
No problems,
just i need to connect the SIM to Arduino (like an SD, for example) and send the contents to pc via USB, or store for write them on another SIM.
Everything you want to know about the SIM reader here:
http://www.ladyada.net/make/simreader/