To get the most out of this book

Ensure that you have a test mobile device on which you can experiment with the techniques explained in the book. Do not try these techniques on your personal phone. 

Some of the techniques explained in the book, such as rooting a device, are specific to the brand and the OS running on the device. Ensure that you research and gather sufficient information before trying these techniques.

If you are using the digital version of this book, we advise you to type the commands yourself. Doing so will help you avoid any potential errors related to the copying and pasting of code.