IPhone 4 doesn't allow reasonable range and other issues with bluetooth headset. Fyi, tried with Apple Bluetooth headset which worked perfectly with IPhone 3G & IPhone 3G-S. Issue, you can have IPhone 4 in shirt or pant pocket and bluetooth will disconnect. Also, you can have IPhone 4 inside car and close the door while standing right outside the door and bluetooth disconnects. This never happened with previous models including IPhone 3G-S with IOS 4 installed.
Other bluetooth issues: as others reported - muffled sound quality to person your talking to. Time delays and disconnects with bluetooth Uconnect. IPhone 4 won't let you change between your car audio phone feature back to IPhone 4 without freezing.
This thread wouldn't be 14 pages long and counting if a simple reboot of the phone was the solution. That's the first step any of us took. iPhone 4 is messed up and Apple needs to fix it.
Bought the new Bose BT1, worked beautifully for a week, then started dropping. Can't even put my i4 phone in my pocket. Rebooting helps, but by the end of the day it's dropping again.
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IPhone 4 Bluetooth Issues
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