Use this simple tool for a quick speed test of the network your iPhone is connected to. This test downloads an image of a known size and calculates the time it took. There are many factors that contribute to network speed such as the type of network (edge/3g/wifi), the number of users on the network, and the server that hosts the image.
iNetwork Test for iPhone was constructed by Xcellent Creations, Inc. with help from:
iPhone Style Icon
JS Connect Speed Library
Test image courtesy of: FREEIMAGES.co.uk
Featured by Walt Mossberg in the
Wall Street Journal