To check you phone quality, just key-in this code.
type *#06#
this will display IMEI number ( International Mobile Equipment Identity)
check your IMEI number at position 7 and 8. Contoh, 666666019999999
7 and 8 is ******01*******
check the list below to know your phone quality
02 or 20 [from factory Emirates or India] = LOW QUALITY
08 or 80 [from factory Germany] = FAIR QUALITY
03 @ 30 or 04 @ 40 [from factory China] = GOOD
06 or 60 [from factory Hong Kong, China or Mexico] = GOOD
05 or 50 [from factory...
