What is actually stored on the SIM card (the white memory card which fits inside the phone underneath the battery). My understanding is it includes your contacts, but what other information is there? Also, what does it take to get the information off of the SIM card and transfer it to another phone (not necessarily Samsung or MetroPCS)? MetroPCS tells me that they can transfer the information to my extra microSD card for $15, but that's only worthwhile if I can access the information from a new phone. Any thoughts?