IPhone 4S won't connect to Wi-Fi? - 2

I have an iPhone 4S and it won't connect to my Wi-Fi. It was connected earlier today but now won't. I have tried rebooting the router but this hasn't helped and I'm still able to connect my laptop to the Wi-Fi. How can I fix my issue?

Iphone 4 v samsung galaxy s3 mini?

I have seen both and I I like both but which is better the Samsung galaxy offers me more minutes texts for a cheaper price but the iPhone offers me more mob but a low amount of texts and minutes which phone is better?

Simpsons Tapped Out River?

I'm playing The Simpsons Tapped Out couple days.
And now my river is turned green. Why? Can i change back to normal?
I have an iphone.