Friends, I did a lot of research about this and I saw that this has been rated, it is not that good quality. the biggest problems of this are that it start virus after a few mounths of work and secound problem is that when its inter in laptop slot, laptop hunging after using few mounths so buying this by crushing so much money is a big loss. apart from all this, its making file quality performance is not very good and in the form of other problems it has problems of sim slot, problem of memory slot problem etc. therefore the rate is much higher than its quality.