Motorola Blue H350 bluetooth wireless headset is 2.0 compliant for any bluetooth enabled cellular phones.
This Motorola Blue H350 bluetooth is the latest technolgy and has 2.0 compliance. Certain phones like the Samsung C417 or C416 can only use 2.0. The lower 1.1 and 1.2 will pair but not connect.
Please check your phone manual to determine which bluetooth is right for your cell phone. Any phone that has 1.1 or 1.2 compliance can use this bluetooth as well.
Remember, the sound on any bluetooth will vary depending on the volume on your phone and the volume set on the bluetooth. I find I get better quality with low volume on the phone and increase the volume on the bluetooth. If you have both too loud, you will get feedback and echo effect.