How to activate Safe Mode on Android Samsung Galaxy phones.
To enter in Safe Mode in any Samsung phone, you need to keep the on-screen power-off button pressed for 2 seconds. When the Safe Mode button appears, just press it... and this is it, the phone is now in Safe Mode.
To deactivate and turn off Safe Mode in Samsung devices, just pull down the notification area and press on the "Turn Off Safe Mode" notification. Then confirm the operation on the screen and that's all!