Samsung starts rolling out Android security patch on Galaxy A5(2015) and Galaxy A7(2016). The update comes with build number A500F1U1CQA1 and A710LKLU1BQA4 for the Galaxy A5 2015 and Galaxy A7 2016 units respectively.
The update will mainly include the security patch and some improvement fixes here and there. Currently the update is live in South Korea but company says the update will be released in stages. So it will be live in other countries very soon.
If you did not get the update notification yet don’t panic and check it manually by going through the Settings > About device > Download updates. Moreover, Samsung recently confirmed that Galaxy A5(2015) will get Android 7.0 Nougat update very soon.