My friend is using coreseca headphone from last one year.Ihave also taken for a while from him and have the pleasure of it.If you have jack problem and if service center is asking money from you to replace the mobile then byte coreseca is a solution to that.The sound quality is fabulous, bass is ecastic, however range was not as expected or u will find written on internet.It was approx 5 metre range and not 10 metre.After 5 metre sound gets cut at regular intervals.My friend bought it from paytm at 1310 but now it is available at amazon at acheaper price.So one suggestion do not think too much just go for it.Friends do rate and comment.