I have tried every advice to get notifications working on some apps that are set to alert but refuse to alert, such as banking apps and paypal. Why have a phone that cost £1,300 that doesn't function properly. Samsung if you can't sort simple issues, STOP advertising how wonderful Samsung is when your technology is failing. I'm tech savvy so please don't ask me to try this and try that...sort your 7.0 One UI Version 15 ASAP!!!