Skype application is a very powerful application which you can download and install to your iPhone 4, but users experienced sound issues during their calls.
Instagram application is one of the most popular application for iPhone users and unfortunately many people have issues doing certain actions with it.
If you are having problems with applications that you download from AppStore or Cydia, there is a general tutorial to do a basic troubleshooting to them.
Activator App can only be found on Cydia, which means that its installation and use requires a jailbroken iDevice. Activator App was created by Ryan Petrich
iPhone tricks for Siri are numerous and they will help you to fully take advantage of her and make your life a lot easier. Read more about the most popular.