About Nokia 6300- reg?

Hi i got a used Nokia 6300( China edition ), and shockingly saw that BL-5c battery is correctly fitting in it i heard that BL-4c is correct for that model.. and i also found that in the back side of the mobile NOKIA will be printed in the original mobile but in this mobile 3d sound was been printed and this mobile have 2 speakers in the back .. kindly may any one say whether this mobile is been really manufactured by NOKIA or not ..