An addition to ChangeWave’s July survey suggests that nearly one-third of U.S. iPhone 4 users would be likely to switch to Verizon as their service provider should the carrier begin offering the iPhone. 18% of iPhone 4 users said they would be “somewhat likely” to switch, while 13% said they would be “very likely” to switch. Notably, the survey results shared earlier this month indicated that the requirement of using AT&T was iPhone 4 owners’ biggest dislike, with 27% of the vote, followed closely by dislike of the coverage/speed/quality of AT&T’s 3G network at 24%. ChangeWave’s survey was based on the reactions and opinions of 213 Apple iPhone 4 owners. In addition, Fortune points to a similar July survey of 1,000 consumers from Morpace that found 47% of current iPhone customers who would consider a Verizon iPhone, with 34% of current AT&T iPhone users who are waiting for the iPhone to become available on another carrier before upgrading.