Yes, some customers have reported issues using a Bluetooth headset with their iPhone 4. Issues include the phone continually drops and re-establishes the connection with the headset and the audio quality on the headset is the equivalent of a bad cell phone connection. This appears to a widespread issue, rather than a Plantronics issue, but there are a few potential workarounds/fixes that you can try, all of which have received positive feedback for correcting the problem.
Option 1: Upgrade the iOS
- Verify your iOS version by pressing Settings > General > About on your iPhone.
- If the version is out of date, update your iOS using iTunes.
Option 2: Delete/REBOOT/Re-pair
- Press Settings > General > Bluetooth.
- Delete the headset from your phone by pressing the blue arrow located to the right of the device name, and then press Forget this device.
- Reboot your phone. IMPORTANT: When rebooting the phone, do not just press and hold the sleep/wake button in the upper right corner of the phone. Instead, press and hold both the sleep/wake button AND the home button until the white Apple logo appears. Note that the standard "slide to power off" message appears, but ignore it. The screen eventually turns black and then the white logo appears. At this point, let go of the buttons.
- Go back to the Bluetooth menu, and pair the headset to your phone again.
Option 3: Reset the network settings
IMPORTANT: This will delete any custom network settings and will return the settings to the factory defaults. This means that you may lose any WiFi passwords they may have saved; however, this is a fix that Apple has suggested for resolving Bluetooth and reception issues:
- Press Settings > General > Reset.
- On the Reset screen, press Reset Network Settings.
- When prompted to confirm, press Reset Network Settings.