Samsung galaxy a5 application can neither turn off

Question

my Samsung galaxy a5 when using an application can neither turn off as I do to restart appreciate them help

Answer 1

Well I have a friend who did the same but with an A3, what he did was wait until the battery is discharged for reuse as bad of these phones is that they are sealed

Answer 2

you can try to hold down the power button until it turns off

Answer 3

Try pressing the power button for 10 seconds. Press the Volume key - and key simultaneously to restart on mobile. This action is very useful as it has the same result as removing the battery on phones where this is accessible.