Samsung Galaxy S21 5G Spectrum Mobile SM-G991UZVACHA Guide

To enable 5G on your Samsung Galaxy S21 5G, go to Settings > Connections > Mobile Networks > Network Mode and select '5G/LTE/3G/2G (auto connect)' to ensure your phone connects to the appropriate network.
If your Galaxy S21 5G is not charging, try using a different charging cable and adapter, check the charging port for debris, and restart your device. If the problem persists, contact Samsung support.
To improve battery life, reduce screen brightness, close unused apps, enable battery saver mode, and turn off features like Bluetooth and location services when not in use.
To perform a factory reset, go to Settings > General Management > Reset > Factory Data Reset, and follow the on-screen instructions. Ensure your data is backed up before proceeding.
Use Samsung Smart Switch to transfer data from your old device to your Galaxy S21 5G. Install the app on both devices and follow the prompts to transfer your data wirelessly or via a USB connection.
To take a screenshot, press and hold the Volume Down and Power buttons simultaneously until you see the screen flash. You can view the screenshot in the Gallery app.
To enable dark mode, go to Settings > Display and toggle on 'Dark mode'. You can also schedule dark mode to turn on automatically at sunset or at a specific time.
If your screen freezes, perform a soft reset by holding the Volume Down and Power buttons simultaneously for about 10 seconds until the device restarts.
To update your software, go to Settings > Software Update > Download and Install. Follow the on-screen prompts to complete the update process. Ensure your device is charged and connected to Wi-Fi.
To set up a secure lock screen, go to Settings > Lock Screen > Screen Lock Type, and choose from options like Pattern, PIN, Password, or Biometric options such as Fingerprints or Face Recognition.