and i return some week after another no working anymore nokia same model ?

and i return some week after another no working anymore nokia same model ?

How do they check if the damaged Nokia isn't the original selled to me ??

Do U Remmber the Last 5 or 3 digits of your IMEI.
If not then do u have any other thing to Remmber like spots, scrach on some particular part.

and i return some week after another no working anymore nokia same model ?

*#06# to get your IMEI number. Note it down and compare with 'new' set.