Every OEM brings a different method of unlocking the screen. For example, Sony’s style is different from the one by HTC. Luckily, it’s Android and all of this customization can be applied at the source code level, with Xposed modules, or using external applications.
If you are not happy with your current lock screen style, you should definitely check an application made by XDA Forum Member Productigeeky. It’s a simple and good looking default lock screen replacement. To unlock the screen, you need to swipe the screen to the right. Swiping to the left launches the camera app, so you can easily make a photo of important and interesting moments of your life. SlideLock also handles the notifications. And by swiping the notifications, you can open or dismiss the message you get. There is even an option to preview a notification, just like with ActiveNotifications, where the screen lights up for a second giving you time to check what’s new. This application doesn’t offer many features or unnecessary graphical additions. The goal is to keep the screen nice and minimalist.
You can get the SlideLock app, by visiting the original thread. If you are looking for a stock lock screen replacement, you should give it a try._________