Tech:apple iphone buying advice

iPhone iPhone 3G iPhone 3GS iPhone 4 -         Basics         Price1 Discontinued Discontinued From £419 From £499 Storage 8/16GB 8/16GB 8/16/32GB 16/32GB Screen Size 3.5" 3.5" 3.5" 3.5" Resolution 480x320 480x320 480x320 960x640 Camera 2 Megapixel 2 Megapixel 3 Megapixel 5 Megapixel Video No No Yes Yes (720p 30fps) Weight 135g 133g 135g 137g -         Connectivity         Wi-Fi 802.11b/g Yes Yes Yes Yes Wi-Fi 802.11n2 No No No Yes Bluetooth Yes Yes Yes Yes 3G No Yes Yes Yes GSM (2G) Yes Yes Yes Yes -         Navigation         A-GPS No3 Yes Yes Yes Digital Compass No No Yes Yes


1All prices are unsubsidised prices from the Apple website.
22.4Ghz only.
3Capable of using trilateration of cell towers and wifi hotspots to find approximate location.