The impetus to upgrade and chuck the old phone is much higher in their case 77% of surveyed iPhone 4 users were upgraders! Source : http://www.zdnet.com/blog/b

The impetus to upgrade and chuck the old phone is much higher in their case 77% of surveyed iPhone 4 users were upgraders! Source : http://www.zdnet.com/blog/btl/handicapping-apples-iphone-4-debut-77-percent-upgrades-15-million-units-or-so/36317 http://www.zdnet.com/blog/btl/handicapping-apples-iphone-4-d...