Samsung Galaxy S21 Plus 256GB Phantom Red

The Samsung Galaxy S21 Plus is promised four major Android upgrades and five years of security updates. This means it will be supported up to Android 15 with One UI 7, and security patches will continue until early 2026. Starting in 2025 these updates are released on a quarterly rather than monthly basis.

To turn off the Samsung Galaxy S21 Plus you need to press and hold the side button together with the volume down button until the power menu appears, then select Power off and confirm. You can also do it from the quick settings panel by swiping down from the top of the screen, tapping the power icon and choosing Power off. If the device becomes unresponsive you can force it to shut down by holding both buttons for several seconds.

The Samsung Galaxy S21 Plus is equipped with a 4800 mAh battery that generally lasts a full day of typical use including browsing, social media and video streaming. With lighter usage it can stretch to nearly two days, while heavy activities such as gaming or recording high resolution video may drain it in just over half a day.

The Samsung Galaxy S21 Plus is covered by four major Android updates and five years of security patches. This means the phone will receive upgrades up to Android 15 with One UI 7, and security updates will continue until early 2026. Starting in 2025 these patches are released quarterly instead of monthly.