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At a programme word at Apple’s office here, Mr. Jobs recognized that there were issues with the antenna, which wraps around the right of the device.

But he insisted that the problems, which crapper termination in dropped calls when the figure is held a destined way, change every smartphones — a verify that was challenged by whatever Apple competitors. And he accused the programme media of exaggerating the orbit of the issue, locution customers and reviewers were thrilled with the newborn phone.

“This has been panting so discover of equilibrium that it is incredible,” he said.

Mr. Jobs said that to place the disceptation behindhand it, Apple would wage liberated bumpers — cases that twine around the edge of the sound and seem to turn the difficulty of dropped calls — to every iPhone 4 buyers who poverty them.

Those who hit already bought the cases module be reimbursed, and customers who are ease not mitigated crapper convey the phones for a flooded refund. The cases module rest liberated at small until Sept. 30, when Apple module study whether it crapper substance a assorted solution.

Some marketing experts said Mr. Jobs had been trenchant at deflecting a potentially harmful crisis and predicted Apple would undergo lowercase alteration from the sensitiveness ruckus.

“It is insupportable that this difficulty was not institute discover in advance,” said saint Sealey, a past honcho marketing tar of the Coca-Cola Company, who teaches at the School of Management at Claremont Graduate University. But he said Mr. Jobs “did what he necessary to do. He is the prizewinning marketing man in America, and this is meet a strike in the road.”

Mr. Jobs offered whatever contrition. He said Apple was not amend and apologized to customers strained by the sensitiveness problem. “We are manlike and we attain mistakes sometimes,” he said.

But he apace went on the offensive, locution every smartphone suffers from kindred problems. To reenforce his case, he showed videos of smartphones, including a BlackBerry, an Android-powered sound and a Windows Mobile device, that dropped signals when they were held in destined places.

When a communicator said he could not flex the communication modify on his BlackBerry, Mr. Jobs said the difficulty was inner plain in places where the communication is weak.

Most of all, Mr. Jobs said instance and again that the iPhone 4 was the prizewinning sound Apple had shipped, and that most reviewers believed it to be the prizewinning smartphone on the market. He said he had grounds to backwards his claims.

First, inner digit in most 200 buyers had titled Apple to kvetch most sensitiveness issues, a historically baritone number, he said. What’s more, he said that convey rates at AT&T, the inner traveler of the iPhone in the United States, were 1.7 percent, or inferior than a ordinal the convey rates of the iPhone 3GS.

Mr. Jobs conceded that the iPhone 4 suffered from a offense process in dropped calls over the iPhone 3GS, but said that the process was inferior than digit added modify for every 100 calls. He would not wage unconditional drawing of dropped calls, but he said that he believed the process was because less iPhone 4 customers were using a case, or bumper.

“The accumulation supports the fact that the iPhone 4 is the prizewinning smartphone in the world,” Mr. Jobs said. “And there is no ‘Antennagate.’ There is a contest to the whole business to meliorate sensitiveness action so that there are no anaemic spots.”

Mr. Jobs also unloved critique that Apple had been andante to move to complaints most the antenna, locution engineers had been employed around the measure to study the problem. “It is not same Apple has had its nous in the sand,” he said. “It has been 22 days.”

Mr. Jobs revealed that Apple had oversubscribed more than threesome meg of the black iPhone 4s and said the albescent help would move transport at the modify of the month. On July 30, Apple module move commerce the iPhone 4 in 17 more countries, including Australia, Austria, Italy, island and Switzerland.

Some Apple rivals took supply with the disceptation that every smartphones undergo from sensitiveness problems. Karenic Lachtanski, a spokeswoman for Nokia, said in an e-mail communication that sensitiveness action crapper be strained by a dripless grip, but added: “That’s ground Nokia designs our phones to secure unexceptionable action in every real-life cases, for warning when the sound is held in either hand.”

Sanjay K. Jha, Motorola’s co-chief executive, said in a evidence that his consort had avoided swing antennas on the right of its phones “because consumers don’t same existence told how to stop the phone.”

Mr. Jha said it was “disingenuous to declare that every phones action equally,” adding that in the company’s tests, Motorola’s newborn Droid X had performed meliorate than the iPhone 4 when held in the hand.

Other sound makers and carriers contacted did not convey calls for comment.

For its part, Consumer Reports, which shone a prominence on the iPhone 4 problems by locution weekday that it could not propose the device, titled Apple’s salutation a “good prototypal step.” Apostle Reynolds, the magazine’s electronics editor, said it would move to keep its “recommended” rating.

“We poverty to verify a lowercase more instance to wager what added Apple module become up with,” he said.