How to perform sql injection test on an iOS app on a non-jail broken iphone 5?

I have been involved in security testing of iOS apps lately. The app is running on iOS on iphone 5. This app is similar to "bookmyshow" app, where user can book events occurring at various places in the city.

I need to perform sql injection testing & report security bugs if any. I am literally clueless about this task. Any help would be greatly appreciated.

Note: The device is a normal iphone 5 & jail-broken device is not available.

Thanks in advance,

Novice_Student