It is Very important to have the Stock and Official Updates for your Samsung Galaxy Trend 3 Duos SM-G3502, Below you can get the one that suits to your Smartphone, Many versions, Countries, And Languages are available too.
Free Download Links for Samsung Galaxy Trend 3 Duos SM-G3502 Softwares:
G3502CZCUANA1_CHNANA1_China_4.3.zip - 587.0 MB
G3502LUBUANA6_UUBANA5_TPA_Panama_4.3.zip - 666.5 MB
G3502LUBUANA6_UUBANA5_TTT_Trinidad and Tobago_4.3.zip - 666.5 MB
G3502LUBUANB1_UUBANB1_UPO_Uruguay_4.3.zip - 666.6 MB
G3502ZNUAMK1_CHUAMK1_China_4.2.2.zip - 609.7 MB