Reports sent to Gizmodo seem to indicate that the bumpers do fix the problem: http://gizmodo.com/5571171/iphone-4-loses-reception-when-you-hold-it-by-the-antenn

Reports sent to Gizmodo seem to indicate that the bumpers do fix the problem: http://gizmodo.com/5571171/iphone-4-loses-reception-when-you-hold-it-by-the-antenna-band http://gizmodo.com/5571171/iphone-4-loses-reception-when-you...