Okay guys, here is the deal. I have been searching and searching for days and I see all of these "HELP ME NOW PLEASE" posts everywhere and I can understand why, mainly because people explain in terms relative to those familiar with operating systems and whatnot, so I hope this post will clear up some of those things...For me, I just bought an iPhone 1st generation from a friend and I currently have service with at&t and I want to keep my service, not upgrade, only use the wifi when accessible, use the ipod, text, call, and use the free apps from the app store, just as if i had an ipod touch except with the texting and calling features, and not add data or any of that mess. The phone is a version 1.1.4 for whatever that matters and so here are my questions: 1. Knowing what I want out of the phone, should I jailbreak or unlock, i really can't tell a difference. 2. If i do either of these, will I still be able to use my existing iTunes account with all of my music and applications and potentially add new music and applications in the future. 3. Do I need a new sim card or will the one in my existing POS phone work just fine? 4. What is cydia, installer? I hear a lot about the 3rd party mess, but i'm just confused. Does that replace the app store or do i have to go there and constantly unlock my phone or what? 5. Will I be added any service charges by at&t for just using what I said? (BTW, I plan on blocking data which brings me to my next question) 6. I know that you can call at&t and tell them to block data but should I do that before I switch phones, after I switch to the iphone, or should i just bypass all of that and use a method like such: ( http://www.ehphone.ca/2008/07/how-to-disable-data-on-your-iphone-or-iphone-3g/ ) 7. After all of this which is the best program/method to use? These are just a few of the many questions that this process has brought me to and if someone has experience and could help ASAP (mainly because I have to let my friend know if I want to buy it or not soon), that would be GREATLY appreciated!