The Big Audio IC for iPhone is a replacement chip that controls the speaker and microphone. Its marking is 338S00105, and it has 144 pins.
- Type: IC chip
- Name: Big Audio IC
- Part number: U3500 for iPhone 6S / 6S Plus, U3101 for iPhone 7 / 7 Plus
- Number of pins: 144
- Compatibility: iPhone SE 2016, iPhone 6S, iPhone 6S Plus, iPhone 7, iPhone 7 Plus, A1662, A1633, A1634, A1660, A1661