Outgoing caller id block:
Caller ID displays the caller's phone number (for all unblocked numbers) on your phone. It may also show the name of the person if it's already been stored in your phone's memory. Caller ID is included with all plans.
Other enhanced Caller ID services display the name, picture, city or state for incoming and / or outgoing calls.
WiFi show password:
Wifi Password(ROOT) is an app that displays all the WiFi passwords stored in your Android. That being said, it won't let you hack or audit WiFi networks. It only displays passwords from WiFi networks that you were previously connected to.Wifi Password(ROOT) is a very useful app to let you take a quick peek at any password from any WiFi network you've ever used.
Sreen lock time password:
You can set up a screen lock to help secure your Android phone or tablet. Each time you turn on your device or wake up the screen, you’ll be asked to unlock your device, usually with a PIN, pattern, or password. On some devices, you can unlock with your fingerprint.
Phone test:
Here are the two main codes usable on most Android devices: *#0*# hidden diagnostics menu: Some Android phones come with a full diagnostics menu. You'll be able to run a check-up for at least some of the phone's hardware.