c2004 and c 2005 differences

[belal]

what are the difference between c2004 and c2005 and if there is no diff why sony make two names for one phone

[Uliwooly]

2G frequencies are the same for both phones but not 3G

HSDPA 900 / 2100 - C1905, C2005

HSDPA 850 / 1700 / 1900 / 2100 - C1904, C2004