Typophone 4 is available in Cydia, we also recommend you to install “lockscreen clock hide” tweak so you can disable the native clock app on lock screen. You can change the background in settings but you need to respring phone to apply the changes.
Switch between 24 / 12 hour time format :1. Use SSH Client to navigate to the theme folder
2. Open up functions.js
3. Go to line 2: “AM_PM = true” and change it to “AM_PM = false”
4. Done!