For optimal speed and battery life while canvassing, here are the steps to follow:
1. Check to make sure all iOS updates are installed. Manually check, because iOS updates may have deactivated your automatic updates.
Select Settings, General, and Software Update to check.
2. Check your Battery usage by App.
Select Settings, Battery, and view the Battery Usage by App. Determine the Apps using the most battery life.
Based on the battery use of the apps, you will be able to figure out which apps you need to change the settings on.
Functions that drain lots of battery are Location Services and Background App Refresh.
Functions that can slow down data connection include Background App Refresh and Cellular Data.
4. Turn off Bluetooth and WiFi when you are canvassing to save battery.
5. Install and use a data speed test app to see your upload and download speed on your data connection while in the field.