Reminders stopped working on iPhone 4S?

I updated my iPhone 4S to iOS 7.1.2 and ever since my reminders haven't been working. When I click the little plus sign to add a reminder, nothing happens and it's a grey-ish colour. Does anyone know how to resolve this?

How does this T-Mobile Jump Work?

Okay so I bought the iPhone 5s from T-Mobile about 2 months ago, and I paid half of the phone already which is $300 something. My Plan says I'm already able to upgrade but the thing is, When I choose a new phone will I have to pay the full price or something? Will I only pay half of the phone?

5s or S5 and other details xD?

Basically I want a new phone donno what to get. I'm contemplating either the galaxy S5 for the iphone 5s or maybe, maybe the galaxy S5 Duos. Now first could you give me advice on the positives in both phones (excluding the duos) do they lag? Are they powerful, or does one have significantly more processing power?
Do they have any significant problems?

Also is the fatal camera error with the galaxy S5 fixed? Does the Duos have the error? Other than they dual sim card how is the duos different from the S5? Any help is much appreciated.

How to backup from DVD to my iPhone 5c?

Everyone has some important contents on DVD or other device. So I need to watch the content from time to time. I need more details about how to do it. Can you give some advice on it?