your device won't receive any OS upgrades, it'll receive only monthly security updates. as your saying that your device is 4 years old model so you have less chance to receive any updates .
also check out is there any system updates available for your device with Samsung smart switch application on desktop or laptop, or visit service centre ....
in Samsung company may be alike iPhone software system forever then Samsung will be 1st no rank!send my feed back to company for first ranking 9896622743 pawan kumar
