Recently I bought an iphone 2g. I haven't received it yet but i have a few questions. 1. When i get the iphone can i just plug it in and begin the Jailbreaking and unlocking process ? 2. If i put my Tmobile sim card and use the Aim App for the Iphone will i get charged for every IM I have if i do not have a plan ? 3. Will i get charged for going on the internet using WiFi if i do not have a data plan from Tmobile ? 4. I do not understand the Data plan such as 50 megabyte or 100 megabyte. What do i need the 50 and 100 megabyte for anyways ? 5. If i use meebo using safari will i get charged for the Im's i receive on meebo ? Thanks for your help!