Samsung Galaxy S21 Ultra 5G Xfinity Mobile SM-G998UZSACCT Guide

To take a screenshot, press the Power and Volume Down buttons simultaneously for a brief moment. The screen will flash, confirming the screenshot has been captured.
To extend battery life, reduce screen brightness, use Power Saving Mode, limit background app activity, and disable services like Bluetooth and GPS when not in use.
Ensure your charger and cable are functional. Try a different outlet or charger. If the problem persists, clean the charging port and restart the phone.
Go to Settings > General management > Reset > Factory data reset. Follow the on-screen instructions to complete the process. Backup your data first.
Use the Smart Switch app to transfer data wirelessly or via a USB cable. Install the app on both devices and follow the prompts to complete the transfer.
To enable 5G, ensure your SIM card and carrier support 5G. Go to Settings > Connections > Mobile networks > Network mode and select a 5G option.
Perform a soft reset by holding the Power and Volume Down buttons simultaneously until the phone restarts. This will not erase your data.
Ensure your software is up to date, use optimal settings for different lighting conditions, and keep the lens clean for the best photo quality.
To update your software, navigate to Settings > Software update > Download and install. Follow the prompts if an update is available.
Go to Settings > Apps, select an app, and tap Permissions. From there, you can allow or deny permissions as needed for each app.