Cant root my device((( topic

Hi guys. I can't root my mobile.
Please help me to find the correct model of my phone.
Course i trying to search before some way to root my phone and change ROM.
And always i received only fails...
I'm really can't found rooting method for that...
My GPS is not working. (((
I relay don't know what to do with this mobile...
May be i'm doing something wrong...
I'm new with samsung, and this my friends send me the present...

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