
unlock your iPhone, press “Settings”, then click on “General”

then click “Information”

Scroll down to the Version (in this example, iOS 5.1.1 Build 9B206).
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Go to your Settings. Click “About phone/device”.
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Click on Software info.
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Your smartphone’s information is displayed. You now have access to the installed Android version.

Go to the list of applications and locate the “Settings” button.

Find and press the “About” button.

This screen displays various information about the phone, such as the Software version, not to be confused with the Build (Windows Phone 8, 8.1).