oh! previously it was in bits and peices, now i am going to tel you the whole story from beggining
===> it had ios 6.1.3, when i bought it.
===> then I updated it on ios 7.0.1 (my sim was working properly without any hack or jail break)
===> I updated again on ios 7.0.2 (and again i didn't jail break that but my sim was working properly)
===> once again it got updated on ios 7.0.3 (this time again i didn't jail break or used any other hacking method but my sim was working )
but when i updated on ios 7.0.4, and i was activating it, I inserted the sim and an error appeared that "INVALID SIM"
and one thing i forgot to tel you that before buying i checked the status it was unlockecd but now i checked its showing locked ....... on CRICKET ... how to unclock it can u tel me and why it got locked ????