Google’s Android Operating System has been a revelation for Smartphones and Tablets. It has many great features and functionalities. But there are some small shortcomings in this OS. One of them is the slow nature of the Dialer and the Contacts app. After tapping on the Contacts app, it take some seconds before the app starts. This is very annoying when an urgent call is to be made. To overcome this, the user can use the exDialer app. It is available on the Google Play Store for free.