Amazon has become the third online retailer to ship the Samsung Galaxy S3 for under £500 which sets the standard for the rest of the competition out there, three weeks before the device goes on sale in the UK. The Galaxy S3 was launched last week and comes with a 4.8-inch Super AMOLED screen with a 1,280 by 720 pixels display, a quad core Exynos 4412 processor clocked at 1.4GHz, 1GB RAM, 16GB onboard storage, an eight-megapixel camera with a two-megapixel front...