As we all know that the lock symbol of iPhone X that appears in the center of the screen, after you install latchkey tweak on your iOS device, the lock symbol will be shown on the upper left corner.
Latchkey tweak is created by iOS jailbreaker Maxwell Dausch and this tweak only works on the iPhone X.
* Make sure you have jailbroken your iOS device with Electra.
* Download LatchKey v0.1.DEB file.
* Cydia is currently not compatible with iOS 11, so you need to follow this tutorial to install LatchKey Tweak on your iOS device.
There are positive comments from X users who have tried it, you may experience it by yourself.