If I purchase a white 16GB 3GS from ebay, which is inside the packaging and hasn't been opened. I know it will be locked to O2 but will it be ok to use normally with an O2 pay and go sim? Will I still get all the features (with my BlackBerry I had to be on contract to use their internet network )? Also, what will the whole activation process be like? Sorry for the questions, they may sound a little but noobish but I want to know before I make the leap .