AT&T's service is still proving to be an obstacle for new Apple iPhone 3GS buyers, according to a survey conducted by PriceGrabber.com.

AT&T's service is still proving to be an obstacle for new iPhone buyers, according to a small survey conducted by PriceGrabber.com.

PriceGrabber, which operates a price-comparison site for online shopping, said it conducted a poll of 2,411 respondents between June 12 and July 10, asking them about why those consumers have chosen to wait to buy the iPhone 3GS. About 10 percent of those polled already owned one of the versions of the iPhone, PriceGrabber reported.

Roughly a third of those polled blamed AT&T for their decision not to switch over, although why they disliked AT&T wasn't apparently called out. The network provider has been criticized, however, for its dropped calls and spotty coverage.

During Apple's conference call announcing another record quarter, however, chief operating officer Tim Cook said the relationship with AT&T was strong. "We have an excellent relationship with them and we're very happy with it," he said.

One reason for not purchasing the iPhone 3GS that PriceGrabber failed to turn up was a simple lack of them. Apple executives also revealed that the iPhone 3GS is supply-constrained; they weren't able to predict when those supply constraints would end.

The actual questions and data are posted to Gearlog.