iOS 8 Slow Speed & Hanging issues

If you are experiencing slowness and Hanging on your iPhone or iPad after the update to iOS 8... then you should try below procedure:

1. Reset all settings

by going ->Settings->General->Reset->Reset All Settings

2. After Restart go to Settings->Privacy->Location Services

Turn off all Apps and System Services with exception of Find My iPhone or any other app(s) you need location services for it.

3. One more important point is that don't use any sort of third party keyboards(e.g. Swift Key, Flesky, etc) until Apple or 3rd App owners provide a strong patch for this issue.

Note: I was facing the same above problem but after doing above steps now my iPhone works same as iOS 7 with all brilliant speed.

Let me know if this helped!