Check your Blackberry origin.

First of all Dial *#06# to get a display of 15 digits IMEI number of your BlackBerry. 

Example: 316725.10.4690216.
The 7th and 8th numbers in between the dots are important numbers here. If the7th and 8th digits of the IMEI number is 10 That means your Blackberry is manufactured in *FI* Finland with very good quality. 

If the seventh and eighth digit is 02 or 20, then your Blackberry is made in Asia with a bad quality. 

If the seventh and eighth digit is 08 or 80, then your Blackberry was made in *DE* Germany with good quality. 

If the seventh and eighth digit is 03, then your Blackberry was made in *FR* *CA* France or Canada with the best quality. 

If the seventh and eighth digit is 04, then your Blackberry is the limited edition made especially in *CA* Canada with the best quality in the world