When you switched the phone off correctly, it knows that it power will be shut down shortly.
That means, all the applications and the operating system get the chance to save whatever needs to be saved and to go through their proper shut-down process.
Removing the battery without switching the phone off will immediately crash every running applications as well as the operating system(OS). It’s just like unplugging your system while it’s running. You can do it, but it’s not advice-able, a […]