We paired the Motorola Oasis with the Apple iPhone 3G. Call quality was pretty good, but not quite at the level we expected. On our end, our callers sounded great--clear, loud, and natural. There was a bit of hiss, but it wasn't distracting. On the other end, however, callers said our voice sounded very harsh; as if it had gone through a digital synthesizer.
As for noise cancellation, we were pleased for the most part. We tested it out in a moving car and at a busy cafe during lunch hour and the headset did a good job of blocking out environmental noise--our callers could still hear what we were saying. Yet, it wasn't perfect. When we tested the headset in front of a desk fan to check out the wind noise reduction, our voice became increasingly fuzzy, and callers couldn't quite make out all of our words.
The Motorola Oasis has a rated talk time of 6 hours and a standby time of 7 days.