Besides the metric on dropped calls, Jobs also said that there had been fewer returns of the iPhone 4 compared to the iPhone 3GS in terms of the launch shipments. This metric was from AT&T's retail though, and not Apple's own retail stores.
Jobs said Apple is still planning to ship the white iPhone 4 by the end of July. The variant of the device had originally been slated to launch at the same time as the black version, but was delayed because of manufacturing problems.
Apple's senior VP of iOS Software, Scott Forstall, makes a surprise appearance during the tail end of the Q&A session to address statements about the iPhone 4's antenna radio baseband software that were brought up in a recent New York Times article. Forstall called the claims that the phone's software was somehow at fault for the reception problems "patently false."