Ever since the software on my Samsung galaxy a3 2016 was updated, I can no linger receive text alerts, sounds or notifications. I set my phone to a master reset, which worked for about two days, but the software keeps updating, & I'm back to square one. It's so frustrating, because I have to guess when I receive a text message. Mybphone doesn't even vibrate! Any suggestions will be greatly appreciated. Thanks in advance.
I had this issue with my Galaxy A3 2015.
The problem was caused by the Hangouts app.
I uninstalled it and restarted the phone.
All the issues were resolved.
Maybe this will work for you?