The latest OS right now until Android Nougat drops by, the Android 6.0 Marshmallow, is now available for the Galaxy j5 users in Serbia. Carrying the build no. J500HXXU1BPG2, the 6.0 update is available for model no. SM-J500H set of devices.
This is not a first Marshmallow update for Galaxy J5 BTW, as one for Indian model SM-J500F was released by Samsung in mid-June. Considering that, it has taken Samsung lot of time to start distributing the said update outside India.
Hit up Settings, and look for the BG2 ‘system update’ now to check if your device is eligible for the update. And don’t forget to keep an eye on our Galaxy J5 firmware page where we share the latest firmware available.