If you want to display useful or nice information like; missed calls, calender, missed text messages, weather, new emails, Twitter and Todo you need a mod name LockInfo
After you have installed LockInfo, it will appear inside stock settings application of yours. You are able to customize this application too and one thing that it’s awesome because it contains awesome features!
If you are interesting to customize iPhone Lockscreen, Iclarified has post a detail steps to do so with images to make the steps clearer to anyone to follow, visit the following link then:
How to Customize Your iPhone Lockscreen Using LockInfo
Hope you will find it useful!
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