This is biggest problems in android phone but this solution is available in your smart phone, you can fixed this problem follow this steps
step 1
Go to your phone setting
step 2
please check you selecting download option and select if you want to off notification
step 3
show notification check box click to uncheck
step 4
turn off notification to click “OK”
step 5
this is complete, you can apply same process and off notification
https://youtu.be/wXUv1LfXrJ8
