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http://www.numberingplans.com/index.php?goto=imei :p heck your IMEI, it is composed of 15 digits like this :
AAAAAA/BB/CCCCCC/D
AAAAAA = Type of the phone (mass production have more than 1 code)
CCCCCC = Serial Number
D = IMEI verifyer
Check your BB.
10 = Finland
20 = Germany
30 = Korea
40 = China
50 = Brazil, USA, Finland
60 = Hong Kong, China, Mexico
70 = Finland
80 = Hungary
91 = Finlandupgrade