I have heard many applications from play store that install themes but didn't try them yet as i don't know its working .I want a new theme on My Samsung Galaxy trend Duos phone-GT-S7392 (Android 4.1.2).Do we have any themes that can be installed from Samsung ??
Samsung phones that are running TouchWiz (Samsung's fork of Android) do not support native themeing, as is the case with other manufacturers such as Sony and Acer. You can check if you're running TouchWiz by dialing
*#0*# on your dialer - if a new screen appears, you are most definitely running TouchWiz.
To achieve support for the theme apps you see on the Play Store, you need to install or flash a custom Android ROM, such as CyanogenMod and ParanoidAndroid.