Does your Keypad look like the one pictured to the left? Then you're in the right place! You've got the Gen 3 SimpliSafe system. If you purchased a system in 2017 or earlier, you have the Original SimpliSafe. Click here to view the article about the Original SimpliSafe. If you're not certain which system you have, you can tell the difference here.
The Entry Sensor magnet uses a slightly different adhesive than the other sensors. Remove the magnet by rotating the magnet slowly until the adhesive loosens and you can pull it off the wall.