Can I use my iPhone 4S while I'm on a plane? If so when can I and when can't I use it while aboard?

I'm going on a flight soon and I was wondering if I was able to use my iPhone 4S while on the airplane. I'm only gonna use it to play some games that don't need any Wi-Fi and listen to music too. Is there any rule against it that I should know. Any help would be appreciated!

Totally. Other than the 10-15 minutes during takeoff and landing, passengers are free to use their cell phone on airplane mode during flight. Flight attendants will announce over the speaker when you'd be allowed to switch on or turn off your phone.

You just can't use it during Take Off and Landing- otherwise you can use it as normal