Why does my iPhone keep freezing? - 2

My 16 GB iPhone tends to go back to the menu when i try to send a message on facebook, or try to load the page. Why? I have near 9 gb left so storage isn't a problem. Why does this happen? Any advice?

Which iphone are you having?
If the model is 3G or lesser I guess you have nothing to complain about, they came like 4 years earlier…
If you have 3GS or above, I guess it's a software bug or something.ry removing background apps ( Double press home button and long press on app icon to clear Background apps )