This troubleshooting step must be completed regardless of whether or not there are any difficulties. Updates include not just coding and visual improvements, but also bug fixes. Make it a practise to apply system updates on a regular basis to avoid operating system problems. iPhones are configured to download updates by default, but if you've changed it earlier, check Settings>General > Software Update.
Apps should be updated.
Your apps, like the operating system, need to be updated on a regular basis to avoid interfering with iOS or causing difficulties. Open the App Store app and tap on Updates at the bottom to manually check for app updates.
