If you don't have a hands-free mic/headset for your phone...
599456
... you're cheating yourself of the best feature of these cellular phones.  Being able to run around and talk or drive and talk makes these phones super convenient. The clarity of the phone is much better with these types of earphones too. Although I couldn't find it @ amazon, I personally prefer when the earpiece fits in your ear and the mic is part of the wire, but this one will work just as well.
Have fun! (And drive safe, will you???)
639520
I can highly recommend this hands-free headset with mic!!

I purchased it so I could safely use my phone on a drive from New Jersey to Florida. Everyone said my voice sounded very clear and I was able to hear them very clearly also.

I've had a very positive experience with this product, however, I've only owned them for about a month, so I cannot speak for how it will perform in the long term.
4537997
Bluetooth music was great.....Hands free phone calls not so much.

Hands free phone call audio was great on my end in the car.....on the other end, however, I all heard was constant complaints about the feedback loop that occurred because the mic picks up the person's voice coming from the speakers.  I tried lowering the volume on the radio, but it was a problem at any volume where I was still able to hear it.
Bottom line, great for music, bad for phone calls.
1687657
sounds like you're in a tin can, not suitable for listening to music but passable for using to talk on the phone...  but cheap!
1068229
I have had 3 Jawbone headsets - the original, this ICON and the newer ERA. I love the no-wires listening even if you have to look like a Borg drone.

The problem? No one can hear me on the later versions. The are great for listening to podcasts or the radio with the iPhone using A2DP which both of the newer Jawbone headsets support very well.

The mics work fine and this must be only if you have a head the size of a grapefruit (girls, jockeys). Once the mic gets about 4" away from your speaking orifice, the voice quality disappears - I have verified this. Pull the headset off and move it closer and it is fine. But you can't wear it like that with a full grown size 7 7/8 man head.

I am off to try a Etymotic Research er89-2 etyBLU2 Wireless Bluetooth Headset that has sort of a boom mic.

Anyone want to buy a barely used ICON or ERA, let me know.
2667566
I wanted this to enable my desktop to pair with my Mpow Jaws headset&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Mpow-Jaws-Wireless-Bluetooth-4-1-Stereo-Headphones-Noise-Canceling-Neckband-Universal-Headset-with-Microphone-Hands-Free-Calling/dp/B015IEW1AY/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Mpow Jaws Wireless Bluetooth 4.1 Stereo Headphones Noise-Canceling Neckband Universal Headset with Microphone Hands Free Calling</a>&nbsp;My headset performs great when paired with my phone, but this LiiR adapter has problems.

  The sound quality is terrible, and the microphone volume is almost non-existent.  It sounds like it is coming through a tin-can phone. Very distracting. I know this is not a problem with my headset, because when my headset is paired with my phone, it sounds clear and sharp when playing music and talking.  Forget listening to music through this, and gaming is not going to happen due to the weak microphone.

  Once I get some alternatives, I'll update this review with which ones perform better.
2724118
useful with the handsfree.  I used with my motorcycle helmet, the only thing is the headset would dislodge a little with the helmet on.  radios work fine.
3475874
Still can't figure out how to be heard through a device when I'm not standing next to it while wearing the mic...
2549307
I didn't realizedo that it didn't have a mic and needed to be connected to blue tooth all the time
4290888
I still cannot find headgear to hold this as hands-free.
4069839
I ordered this to use with my cordless phone and headset and discovered when I received it that it only works with corded phones.  It plugs into the telephone receiver, then the telephone cord plugs into the other side of the Rf filter.  I tried it on my corded phone and it didn't help reduce the buzzing sound in my new wireless headset.  I then called Plantonics and they're replacing the headset, so I can't comment on how well the device works when you have a functional headset.
2672080
Plantronics has missed the boat with regard to the iPhone and new phones using a 3.5mm jack.
This headset requires an adapter and there is your problem.

There are different types of adapters (mono, stereo) that are very cheaply made that break or are not wired appropriately for mono headsets.  Those that are properly configured, such as Headset Buddy (look for the red ones),  are overly expensive and are often counterfeited being made with inferior components.

Cellet, available on Amazon, is offering a 3.5mm plug on its headset that does not require an adapter. "Cellet 3.5mm Headset with Microphone Boom".  Check it out before you buy this.
It has a stereo plug (4 metal bands, 3 insulating rings) for plugging into a stereo jack such as the iphone and converting it  to a mono headset.  Cellet I think has this wired correctly to avoid  shorting right and left channels together.  Thus, it may make a better electrical connection than an adapter and provide a more reliable sound.
3728610
Overall, a reasonably comfortable headset with pretty decent sound. Included auxiliary cable and USB charging cable were of very nice in quality.

My issue with this headset is that you can not have high definition audio and use the microphone to talk to a friend at the same time. This may be due to the limitations of Bluetooth, but I did not see this anywhere when I watched reviews of this product. Matter of fact, don't use this device at all if you're looking for a headset to talk on. It sounds like you're talking on a phone from the 1990's with terrible reception.
2858721
Good sound, but the microphone is not the best.

I purchased these after I lost my other pair of JLab buds for my phone.
The fit on the ear was okay, but I could never seem to get the person I was calling to hear me without yelling and holding the mic to my mouth (defeating the purpose of a hands-free set).

Luckily I found my other pair of Jlab Buds, which cost only a few dollars more

These are the ones I recommend if you are using the headset for your phone:

http://www.amazon.com/JBuds-Metal-Earbuds-Style-Headphones/dp/B005VEZ58C/ref=sr_1_28?s=electronics&ie=UTF8&qid=1413938464&sr=1-28
215710
It's okay... Just don't like that you need to remove the phone just to talk on it.
2793247
I wanted to use primary for hands free answering phone, I could hear well but the other party cannot hear at all.  The mic is not walking.
435861
When in speaker mode, I must remove case for people to hear me on the other end of the line.  Bought the companion car mount which works well, but is useless if I have to remove the case.  This is an accident, literally, ready to happen.