According to Unwired View, users of the Samsung Galaxy S3 Mini in both Vietnam and Indonesia have reported that their device is running on Android 4.1.2 Jelly Bean instead of Android 4.1.1 ( which was originally announced by Samsung). However since the Galaxy S3 Mini hasn’t officially make it’s debut in the Indonesian market, we can’t really confirm weather the device will be shipped with Android 4.1.2 in near future.
Nevertheless, if you’re holding on to the Galaxy S3 Mini which is currently running on Android 4.1.1, you can actually flash your device to Android 4.1.2 firmware (I8190DXALL3) which is available via xda-developers.
Source : Unwired View