According to the results of the latest ChangeWave survey, U.S. iPhone 4 users reported nearly identical levels of satisfaction, whether they were on Verizon or AT&T. Among Verizon iPhone 4 users, 82 percent said they were “very satisfied” with the handset while 16 percent described themselves as “somewhat satisfied,” compared to 80 percent and 18 percent of AT&T iPhone 4 users, respectively. The survey also sought to…