A. 1. Clear the app cache: Go to your device's settings, find the 'Apps' or 'Application Manager', locate the Three UK app, and select 'Storage'. Tap on 'Clear Cache'. This can help improve the app's performance by removing temporary files that may be slowing it down.
B. 2. Update the app: Ensure that you have the latest version of the Three UK app. Go to the App Store (iOS) or Google Play Store (Android), search for the Three UK app, and tap 'Update' if available. Updates often include performance improvements.