Try resetting your network connections. You will have to reconfigure all your wi-fi and BT connections. Settings/general management/reset/reset wifi and Bluetooth settings. Also clear the phone's cache partition. To clear the phone cache:
1. Power off your phone. Hold Power and vol up buttons until Samsung Logo appears 2. Let go of both buttons when you see the Samsung Logo appear on screen. There will be a delay while it enters recovery mode. 3. Use the volume buttons to navigate through recovery menu options and highlight āWipe Cache Partition.ā Press power button to select this option. Confirm by navigating to the yes response and tapping the power button to select. 5. When wiping cache partition is complete, "reboot system now" should be highlighted; press power key to select it. The phone will reboot as normal.
