A. Ensure that your device has enough storage space available. Go to Settings > General > iPhone Storage and check if you have at least 1GB of free space. If not, delete unnecessary apps or files to free up space, which can help improve processing times.
B. Close any background apps that may be consuming resources. Double-tap the home button (or swipe up from the bottom of the screen on newer models) and swipe away apps that you are not using.