After using two iPhones 4 for six weeks Wall Mossberg finally reviewed the newest Apple’s handset.

So, one phone was obtained by Mossberg personally, while the second was provided by Apple. Walt found that iPhone 4 works better than iPhone 3GS in those areas where there is a "strong AT&T coverage", but when it comes to weak coverage areas iPhone 3GS performs better, because it drops less calls and 'no service' status can be seen rarer. That became a reason for Mossberg to not recommend iPhone 4 with its limited AT&T data plans to people who "live, work or travel" in areas with poor reception signal.

Walt also found that the 'death-grip' issue is not a problem as it causes signal bars to fluctuate only and even to rise in some cases.