Apple and the iPhone's major US carriers are imposing artificial caps on the cellular speeds of the iPhone and iPad, claims Joseph Brown, a developer of hacked carrier updates. Brown notes that by scrapping a line of Apple code in his AT&T update, iPhone 5 and fourth-generation iPad speeds saw "significant and noticeable results." AT&T iPhones are reportedly limited to 14.4Mbps HSDPA, despite the iPhone 5 being capable of 42.2Mbps DC-HSDPA+, and AT&T's 3G network supporting speeds up to 21.1Mbps. The carrier also reportedly limits LTE.
