Android
Step 1
Go to Settings and Select System
Step 2
Click on Reset options then Reset Wi-Fi, mobile & Bluetooth
Step 3
Click Reset Settings and confirm by selecting Reset Settings again
Step 4
Once Network Settings have updated Restart the device by holding down to power button and selecting Restart
Apple
Step 1
Click on the Settings icon from your Home Screen and select General
Step 2
Scroll down on the page and click Reset then Reset Network Settings
Step 3
Confirm by selecting Reset Network Settings