Ars Technica has received confirmation from the horse's mouth that AT&T is not capping data speeds for iPhone 4 users, as recent rumors have suggested. AT&T said that what some users are experiencing - a degradation in upload speeds to as low as 100 Kbps - is the result of a software defect in the Alcatel-Lucent equipment that AT&T uses in some of its cell towers. AT&T noted that the defect should affect only about 2 percent of users, and that Alcatel-Lucent is working on a fix. follow link
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AT&T Denies Data Capping