With the increased sale of smartphones, the demand of headphones with mic has shot up tremendously in the market. It meets both the purposes actually. It enables you to listen to the music (and at times people do watch a movie too on their smartphone) and the moment you have an incoming call in between you can take it without any hitch. Not only that, the moment you are through with your incoming call, you are instantly back to your music or movie, without any further break. That also applies to a call you want to make while listening to the music on your smartphone.
These days you have a wide variety of headphones with mic available in the market ranging from a very nominal price going as high as to the price of a notebook. Some elegant and highly technically sophisticated ones are sold at a very high price. But then it is the quality and technology that goes into building the high price. It does not mean that the low-end headphones with mic are not at all good in quality. Probably it should be looked into another perspective. For a routine kind of listening and voice delivering process, you might not need a very high-end headphone with mic. But if it comes to such a high quality based voice delivery where there should be complete noise suppression and zero disturbances then probably those sophisticated high-end headphones with mic come into the picture.
You need to be careful while making your purchase of a headphone with mic. It must be purchased from a reputed online/ offline store. It should be from a good brand. It must carry a warranty and there should be a balanced value for money in the deal. Although when you buy a smartphone these days, a headphone with mic is bundled with it, mostly. You have no choice to exchange it to a better one, if it is not of a good quality, but you can always opt to buy a headphone with mic of a good quality from market to make the sound delivery of your devices rich in quality and highly effective.