OS of my mobile

Hello,
I want to know the operating system of my mobile phone if it exists
.
Where can i find it.
I serarched in the net , and i didn't find anything about.
I have to develop a mobile application.
Thankssss

Mobile phones don't usually mention their operating system.
Which phone do you have?
It might be symbian.

Hi,
I think it's appeared on the android mobile settings.
Go to setting>Phone>about phone>Legal Information

Thanks,

You can use Mobile Website Redirection | Device Detection | Handset Detection to detect the Mobile OS