The iPhone 4’s reception issues may get all the press, but there may be another big issue when it comes to iOS 4: a growing number of users are reporting that upon upgrading any iPhone to iOS 4, the performance and audio quality of Bluetooth headsets is vastly degraded.
The symptoms vary, but are usually reported as sounding “muffled,” “like you’re in a tunnel” or “far away” when using a Bluetooth headset with any iOS 4 device.
Users are also reporting significant issues over at the Jawbone forums, prompting a Jawbone spokesperson to comment:
We are aware of and concerned with the user frustration surrounding the issues affecting all Bluetooth devices (headsets, car kits, and speakers) connecting to the iPhone 4 and iOS4 updated phones. We know users have come to expect the freedom of hands-free and we are working night and day with our partners, Apple and AT&T, to resolve the issues as quickly as possible.”