The following steps may differ between Android versions. To learn which Android version your device has, find and tap Settings → About phone → Android version. If you do not see About phone under Settings, tap System.
- Downloaded applications can cause your device to behave unexpectedly or affect its performance. Use Safe mode to check if any downloaded applications are causing the problem. In Safe mode, your device only starts with software and applications that were already installed when you purchased your device.
- If the device’s performance improves in Safe mode, it’s likely that one or more of your post-purchase downloaded applications are affecting the device negatively. You can exit Safe mode and restart the device to uninstall the application or applications that you suspect are causing the problem. If the problem is recent and you're not sure which application is causing the problem, you can start by uninstalling the most recently downloaded application.
- Update your device to ensure that you have optimal performance and the latest enhancements.
- Perform a factory data reset. This is sometimes the best solution if your device stops functioning properly, but note that it will delete all personal content saved on the internal memory of your device. Make sure to back up data that you want to keep.