While there being still no public iOS 12.1.2 jailbreak release, advanced users can at least use the developer-focused rootlessJB for iOS 12 – iOS 12.1.2 to jailbreak their iPhone or iPad.
If you use Apple’s Music app to enjoy music on your iOS handset, then you’re likely familiar with how the app’s Now Playing interface doesn’t fill the entire display.
If you’ve got a stack of old, deactivated iPhones laying around without SIM cards, then you’ve probably become very familiar with iOS’ inherently annoying ‘No SIM’ alerts