I'm trying to buy an Unlocked iPhone 3GS on Ebay. My question is: Which is the best baseband? Any iPhone that i buy will need to have Firmware: 4.3.3 The thing I don't understand is which baseband is the best? For example: There are iPhones that are on Firmware: 4.3.3, and have basebands of: 05.16.02 06.15.00 05.13.04 05.11.07 What's the difference? What do these numbers mean? Does baseband even matter? I'm a noob to all this, so I'd really appreciate someone explaining this to me. I will primarily be using this iphone in the Caribbean.