Almost out of data on iPhone?

I have a 16gb iPhone 6 and I saved all my photos to iCloud and it uses 3gb. I added up all the megabytes that my other apps use and it only adds up to about 5 gigabytes when I phone says I used 10 and I have 2 remaining. Should I restore my phone? And what should I do with my pictures?

Iphone 6. Data and Wi-Fi turned on. Will apps only run on data? Or, will it use Wi-Fi when available?

It seems i'm burning through data. I tried turning off data to an app i was using when i had Wi-Fi while cannected to Wi-Fi and continually received a message to ho to settings>Cellular>Cellular Data>Use cellular data for>then a selection of aps like safari, google maps, ap store… With cellular data turned off or if just the app chosen not to use data. I was unable to access when connected to Wi-Fi.

How long will 250mb of data last me?

I just got an iphone and my dad got me a contract for 250mb per month. I don't go out much so i'll be using my phone on Wi-Fi most of the time. But when i do go out, how much and how long will i able to use social networks for? The apps i use the most are snapchat, instagram and twitter

Are there any iPhone apps that prevent me from using my phone?

I recently got my nanna's old iPhone and I'm addicted to it. I need a way to prevent me from using it at bedtime, whether it's a technique that I can use to help me stop using it, or an app that will physically bar access to my phone after a certain time.

Why do I want the iPhone 5C?

So I have the iPhone 6 but for some reason I really want the iPhone 5C. Like I wanted for reals. There's just something about it. And I would like one in white. Can anybody explain this to me please?