The senior executive in charge of Apple's iPhone is leaving the company for undisclosed reasons.
The departure so soon after the iPhone 4 launch has sparked speculation that the move is linked with device's connectivity problems, according to the Financial Times.
Mark Papermaster, Apple's senior vice-president of devices hardware engineering, will be replaced by Bob Mansfield, the head of hardware engineering for Macintosh.
In June, the iPhone 4 broke all sales records for new Apple devices, but in July, Apple chief executive Steve Jobs apologised for the reception problems and offered free cases to buyers to help mitigate the problem.
But Jobs angered other smartphone suppliers by saying Research In Motion, Samsung and HTC had similar problems with some of their handsets.