hello @alokkumar121,
it's interesting to see this article as just today I bought some jbl headphones which are not bad at all they cost me about 25$ and from my point of view they are wonderful, the only problem I can notice with the generic ones vs the originals is the charging time, in the generic ones the charging time is much less, while in the originals the charging time is much longer, but other than that the features and functionality are very similar, so if you don't have the money for an original, the copies work fine.