main jitne bhe ptcl users ko janta hun sebke sath yehi problem hai, and even kuch ko ptcl ne keha hai ke copper wire se fiber pe shift ho jain, wo apna fault kebi nei mantay. but agr aik bar wo thek ker jain after complain to aik hafta thek chel jata hai aur phir se same problem... 3 sal se aise he chel reha hai