Pressing the Home button will take you out of settings and back to the Home Screen.
One way to downgrade an iPhone 4 is to go into settings on the phone and reset it to factory settings.
ios6 is in settings ios5 is settings --> general --> Bluetooth ios4 is same as ios5
The new safari iOS 7 will help an iPhone user to bring back deleted history on the iPhone safari without the advanced settings in the settings app.
a default app that says "settings"
change language settings
Tap on Settings and scroll down to "Messages."
Settings, General, About
Yes, the iPhone 4 does recieve Amber Alerts. There is an option in settings to disable them.
To check the bootrom on your iPhone: Settings General About At the Bottom - Modem Firmware
Yes. Any iPhone after the iPhone 4S comes with Siri, but you have to choose to enable it when you're setting up the iPhone for the first time. You can always change your mind (and other Siri settings) later, by going to the Settings app. 10
Settings, General, Network
try the settings