Since it's inception, Android OS has grown by leaps and bounds. When IOS is concentrating more on  User interface and user experience, Android is concentrating on Features and customizations. 

Android is like an Ocean and the new features comes on adding at regular intervals. Here is an useful trick that helps you to know more about your android mobile which you can't see in Phone Settings.

1. Go to Dialer and type *#*#4636#*#*

2.Once you type, you will see the options mentioned below. If you have a dual sim mobile, you can see Phone Information 1 and Phone Information 2. 

3. Click on the sim that you want to know the information.

PHONE INFORMATION :

Once you click on Phone Information, you can see the phone number, IMEI Number, Network type and all the other information.

You can see all the information related to your mobile network and you can manually change the Network Types etc.

2. USAGE STATISTICS :

You can click on Usage statistics to know the statistics of the apps on your mobile. This option will show since when you were using the app and how much time you have used the app.

3. BATTERY INFO :

Battery info will give all the details related to your battery. You can see the Battery Status,Battery Health, Battery Voltage etc.

4. WIFI INFORMATION :

You can use this option to know the WIFI Information on your mobile.

In this way, By Dialing *#*#4636#*#* we can know the hidden statistics and details that we can't access and see in Phone Settings.