iPhone 4“天线门”悬案告破，苹果只改了20字节代码

Core Viewpoint - The long-standing mystery of Apple's iPhone 4 "Antennagate" has been resolved, revealing that the issue was caused by a software algorithm error rather than a hardware defect [1][3]. Group 1: Background of the Antennagate Incident - The iPhone 4, launched in 2010, faced significant backlash due to a design flaw that caused signal bars to drop dramatically when held in a certain way, leading to a major public relations crisis for Apple [1][3]. - In response to the controversy, Apple initially claimed that users were holding the phone incorrectly, but later acknowledged the issue and provided free bumper cases to affected users, as well as settling a class-action lawsuit [3]. Group 2: Technical Findings - The software algorithm responsible for displaying signal strength was fundamentally flawed, often showing two bars more than the actual signal strength, creating a false sense of security for users [3][5]. - Software engineer Sam Henri Gold discovered that the issue stemmed from a lookup table in the CoreTelephony framework, which was modified to correct the signal strength display [4][6]. - The adjustment involved changing only 20 bytes of data, resulting in a more accurate representation of signal strength, although users would see fewer full bars [5][6]. Group 3: Psychological Adjustments - The update not only corrected the signal display but also slightly increased the height of the lower signal bars, which may have been a psychological strategy to make weaker signals appear less severe [8][10].