Macrumors reports:
“MacRumors has received reports from several readers noting that the download cap for iPhone applications installed via 3G has been increased to 20 MB, a change that also appears to apply to iTunes Store content. Previously, users attempting to download content over 10 MB in size were prompted to connect to a Wi-Fi network or use a computer to obtain the applications. With the ceiling now increased to 20 MB, developers trying to stay under the cap limits in order to avoid frustrating users unable to install their applications while on the go should have significantly more flexibility for their applications.”
This change also affects Australian iPhone users, with posts indicating this the 20MB limit now applies to users of the Optus Network in Australia.
Speculation around this change appears to centre on the pending release of Apple’s iPad device (expected in March/April). Due to its physical dimensions the iPad will require increases in the size of artwork and design elements over that of the iPhone. It is still unknown why a download limit is in place for the iPhone at all, other than as a concession to sole retailer of the iPhone in the United States, AT&T, who offer unlimited downloads with their iPhone plans, unlike Australian mobile networks limited download quota bundles.