Do others experience unreliability with bluetooth headsets and Iphones?

I have tried a Motorola blue tooth headset, a blue ant headset and a blueant hands free device with my IPHONE 3 but I have had issues with all of them intermittently not answering or hanging up on people. restarting the Iphone and re pairing seems to be the only solution. Other phones work with these headsets - will the H700 be any different? Do you have to buy something different to have the reliability I am used to with a normal phone connecting to a headset?

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