The Apple iPhone 4 Bumper was released by Apple in June 2010 as a protective cover for the iPhone 4. It covers the metal band around the perimeter of the iPhone while leaving the back surface visible. The iPhone 4 had a highly publicized issue in which the antenna configuration could lead to reduced signal reception if the user held the phone in a particular manner. On July 16, 2010, Apple began offering such customers a free bumper to insulate the antenna during use. The bumpers were withdrawn
iPhone 4 - Wikipedia
iPhone 4, Apple Wiki
Review: Apple iPhone 4 Bumpers
Review: Apple iPhone 4 Bumpers
iPhone 4: a Welcome and a Warning - Official site of Stephen Fry
iPhone 4, Apple Wiki
Top 10 Rugged Phone Cases
iPhone 4 - Wikipedia
Review: Apple iPhone 4 Bumpers
iPhone 4, Apple Wiki
iPhone - Wikipedia
iPhone 4, Apple Wiki
File:IPhone 4 Bumper - Universal Dock w-o Adapter - Flickr - Yutaka Tsutano.jpg - Wikimedia Commons
iPhone 4, Apple Wiki
iPhone - Wikipedia
