A recent ChangeWave report surveyed 4,068 wireless subscribers and revealed that AT&T iPhone users see more than double the amount of dropped calls compared to their Verizon iPhone peers. AT&T iPhone users reported that 4.8% of calls were unexpectedly dropped on the network, a far cry from Verizon at just 1.8% of calls. This lines up with a survey of overall cell phone customers that found 4.6% of AT&T subscribers and 1.4% of Verizon customers have reported dropped calls.

In addition, 46% of prospective iPhone 4 buyers say they will be going with Verizon, with 27% favoring AT&T and the remaining 27% still undecided. If you look back at the last survey from ChangeWave, it looks like the deciding factor for consumers on which carrier to choose is network quality and dropped calls. Based on these new results, it looks like AT&T (and their new T-Mobile spectrum, if the deal goes through) has a lot of work to do in terms of improving their network and lowering dropped calls if they want to stay competitive now that Verizon has the iPhone 4.

It’s not all bad news, however. Consumer satisfaction was about even, with Verizon showing 82% of iPhone users being very satisfied with their device compared to AT&T iPhone users at 80%. The iPhone has historically held much higher consumer satisfaction ratings than smartphone competitors like RIM and Motorola, so this didn’t come as much of a surprise to us.

Are you planning on buying an iPhone 4 soon? Which carrier will you be going with, and why? Sound off in the comments below!

[ChangeWave]

According to a Gizmodo reader who took his iPhone to the Apple Store Genius Bar due to issues with dropped calls, he was told a 30% failure rate in New York City is normal.

Now, we all know AT&T’s network crumbles beneath the weight of the iPhone (and suspect any other single network might as well), but it’s not often we get numbers to go with it.

AT&T claims to be improving their network and adding more frequency, but with a fail rate that high, New Yorkers will believe it when their calls stop dropping.