Do iPhones put the clocks back automatically?

I have an iPhone 4S and I was wondering if they automatically go back an hour for daylight savings time.

Yes they do.

It should do. But to be sure make sure you go on to settings and time and date, on there choose on for the set automatically. Hope this helps.

Yes it does! It is a smart phone and all iphones go back! If not go on setting data and time and make sure its set on automatically!