iPhone 4
8
Also on July 2, Apple issued another statement on its website stating, "We have discovered the cause of this dramatic drop in bars, and it is both simple and surprising. The formula we use to calculate how many bars of signal strength to display is totally wrong." Apple promised to release a free software update "within a few weeks" that would address the "mistake," which had been present since the original iPhone. The New York Times commented that "the failure to detect this longstanding problem earlier is astonishing." The device was generally well received by critics. Engadget called it "the best smartphone on the market right now". CNET gave the iPhone 4 a rating of 8.6 out of 10, one of the highest ratings it
Critical reception
has distributed to any smartphone. Walt Mossberg of The Wall Street Journal called the device "the best device in its class". TechRadar gave the device 4.5/5 stars but rated it on par with rival HTC Desire.
Timeline of iPhone models