Colorful smile is available for iPhone now. Add in 2 minutes
Here is a free instruction how to add a rainbow smile:
Go to cydiafree.com and open the main page.
Install Cydia and open the app. It has many custom tricks for IPhone, so use the search to find ”iOS screen smile” to install it.
You will get a jailbreak with free custom option ”iOS screen smile”. Go to settings, scroll down and click on ”iOS screen smile”. Turn on “Enabled”, then click “Themes” below and choose “Colorful“.
Custom option ”iOS screen smile” will be activated.