I've been using the boAt Rockerz 255F since the past 3 months. I purchased it from amazon at INR 1000 in a sale. I saw it's reviews on youtube and amazon and they were pretty good. But when I used it, I must say I was really disappointed by the quality of it's mic. Almost every review I saw mentioned it's sound quality which is no doubt pretty good. But on phone calls, it's the worst. Apart from the great sound quality, let me mention about the worst quality of it's mic :
You've to speak really loud if you want the other person on a phone call to hear your voice. Often, you'll have to take the mic near your mouth which is very irritating.
There is alot of backgroud noise which the other person on a phone call complaints about.
Often, I've to disconnect the earphones on a phone call due to the worst quality of it's mic.
I would suggest DON'T go for this earphone if the mic is at all important to you.