How to Fix a Buggy or Slow iPhone, iPod touch, or iPad
STEP 1. First you have to kill recent apps in your Fast App Switcher.
STEP 2. Now simply restart your iOS Device.
STEP 3. If an app giving you problem repeatedly then simply delete and re-install it.
STEP 4. If your iOS device is jailbroken and running lots of tweaks then simply remove them and re-add them one at a time.
STEP 5. Simply update your iOS device to the latest firmware.
STEP 6. Simply restore your iOS device as new, then reinstall everything on your iOS device.
That’s it. In this way you can fix a buggy or slow iPhone, iPod touch, or iPad. If you found any difficulty in following the above steps then feel free to ask in the comment section below.