But Motorola phones running the Android operating system, including the Motorola Droid , came in a close second in the survey conducted by ChangeWave Research.
ChangeWave found 77% of iPhone customers said they were very satisfied with their purchase, ahead of owners of Motorola smartphones, with 64%. Motorola's second place finish puts it well above the industry average for recent purchasers, ChangeWave said Wednesday.
In terms of mobile operating systems, the iPhone also finished on top with 71% saying they were very satisfied customers, while the Android coming in with a close second, with 67% very satisfied. The Palm Web OS came in third with 57% of Palm users saying they were very satisfied. The RIM OS finished "well behind the three industry leaders" with 37%, but ahead of Windows Mobile with 24%, ChangeWave wrote.
Owners of HTC devices finished third in customer satisfaction with 51% very satisfied, while Research in Motion's BlackBerry devices finished fourth, with 46%. Palm devices were fifth with 45%, followed by LG at 40% and Samsung at 35%.
Motorola's Droid is driving the high satisfaction levels for Motorola, with 69% of Droid buyers saying they were very satisfied with the new Droid running on Android compared with 50% for all other Motorola models, ChangeWave said.
For HTC models, 68% of HTC Hero customers surveyed said they were very satisfied, ahead of the HTC Droid Eris with 50% and HTC Touch with 38%.
The ChangeWave survey, conducted April 21 through May 2, did not include results for the HTC Droid Incredible, which hit stores April 29. The Tour got the highest very satisfied rating of BlackBerry phones with 56%, beating out the Bold with 48% and the Storm with 45%.
ChangeWave also found that the biggest dislike on the minds of iPhone owners was AT&T as its service provider, by 22%, ahead of their dislike of the battery life (19%) and lack of multitasking (11%). For Motorola, the biggest dislike was battery life, with 14%.
ChangeWave also saw a surge of interest in Android devices in a survey of 4,000 potential smartphone buyers it conducted in December.
ChangeWave also has studied AT&T's role as the exclusive wireless carrier of the iPhone in the U.S., noting in early May that more than half of Verizon Wireless subscribers surveyed said they would buy an iPhone if it were available with Verizon .
In the latest survey, 32% of smartphone owners said they would have purchased the iPhone if it was available from their carrier instead of the phone they did purchased. Palm smartphone buyers showed the strongest interest in buying the iPhone, followed by Motorola buyers.