Using the Quad Lock case for your Samsung Galaxy S21 is a breeze. To attach your phone to the mount, align the case with the mount and use the dual - stage Lock. Just follow the natural movement; no need to use excessive force. Detaching is equally simple, just reverse the process. When using the phone in the case during your daily activities, it can handle normal bumps and knocks thanks to its tough core and impact - absorbing shell. But avoid dropping it from a great height. For maintenance, you can use a soft, dry cloth to wipe the case clean. Don't use harsh chemicals as they might damage the soft - touch material or the protective layers. And remember, it's compatible with wireless charging, so you can keep your phone powered up without removing the case.