Update README.md

README.md

@@ -24,6 +24,7 @@ Option | Explaination
 locate | Will return the most accurate set of coordinates possible <br/> and a link to them pinpointed to OpenStreetMap |
 cellinfo | Will return a set of uniquely identifiable information about cell towers near the phone. <br/> You can then put this information on [OpenCellId][1] to individuate the smartphone's <br/> approximate location. Requires enabled location |
 battery | Will return battery infos |
+lock | Will  lock down the smartphone |
 callme | You will receive a call from the lost smartphone |
 wifi | Will return Wi-Fi infos. Requires enabled location |
 wifi-enable | Will enable Wi-Fi (Only API < 29) |