Why is my iphone using so much data?

I have the iphone 5s. I make sure all the time to keep my internet offline. If I ever use internet (which I don't) I use my house's Wi-Fi. I don't know why it keeps loading up on my data. I don't have an icloud account, I made sure to delete my emai from the phone… What else could it be? The only thing I did yesterday was look at my Verizon account to see how much data has been used. And I played the offline version of candy crush the game. What could it be?

Added (1). I forgot to mention, my phone is connected with my siblings internet plan (Wi-Fi)… Could that be the reason too?

Added (2). @Aleks-Yes that's what I meant, lol

Will I be able to use an iPhone 4 from the US in Peru?

Well I'm thinking on buying a used iPhone 4 in the US and bring it to Peru to use it here but I was wondering if it must be unlocked. Also, I heard there are some mobile companies in the US that don't use SIM cards or something similar so I guess that I won't be able to use the iPhone in Peru in that case. Correct me if I'm wrong though, I'm not sure about that. But if I'm correct, then which mobile companies DO have SIM cards so I can use the phone here?

My Iphone is stuck on Connect to Itunes?

I went to update my Iphone 4 today because I got the notification, and it wouldn't load! So i restarted it and it comes up with a Connect to Itunes on the screen and it will not go away. I try to connect it to itunes and it simply will not connect to any itunes

People with social welfare but act like millionaires?

I just want to know what is your opinion on people who's on social welfare but spends their money like they're millionaires (on unecessary items such as iPad, branded items, iPhone, Beats etc)
I don't mean to offend anyone but I just want opinions on this.
I have a friend that is on social welfare. Dad was a bus driver. Mother is a housewife. Dad hasn't worked in 5 months because of his "sore back" but doesn't have a problem with sitting in front of the tv for 3 hours straight on eBay. *sigh* I want your opinion on this. Do you think it's okay to live like that? And if you're wondering if they're just loaded I'm telling you they're not. They couldn't pay their rent but then my friend tells me she bought jeans and shorts worth €150 and got a new iPad. And her dad was okay with it because she always buys branded clothes and doesn't shop in "cheap" shops in like Penneys.
I have this urge to tell her "STOP! YOURE ON SOCIAL WELFARE! WHY ARE YOU SPENDING MONEY ON DISCRETIONARY ITEMS AND SUFFER TO PAY RENT BY THE END OF THE MONTH?" It just sucks seeing how someone can live like this. I don't know it's none of my business but. Just wow! My first time seeing someone like this. What do you think? Is it okay to live like that? What do you think about to is?

Added (1). Tom: I don't mean all people on social welfare I mean the ones that spend their money like millionaires when they can't even afford to pay the basic things like rent yet choose to buy expensive things like branded clothes etc.
and yes a free iPhone with a phone plan ain't really a luxury however if you are in a poor state would you choose a Nokia block for €10 a month of would you still choose an iPhone for €60 a month? I'm talking about the people who would choose the iPhone and not prioritize something more necessary.

I can't figure out whether I have been blocked on whatsapp or not?

I messaged this person today but it hasn't gone through. As in that there are no ticks by the messages.

I have read the whatsapp page about how to know if someone has blocked you however it's very unclear.

I should mention this person has an iPhone therefore they can switch off their "last seen" status so I can't figure it out through that:|
It's very unusual and hard to believe that he doesn't have internet connection

Any help would be much appreciated

Why won't my iphone send messages?

I try to send text messages but they said they can't send them, and it won't work when I press the try again buttons. I'm also not receiving them.

I dropped my iphone 4 in water and my rear camera has water in it

I dropped my phone in the toilet, as soon as it landed i grabbed it back out. I was running late so I just dried it off and left. An hour later I see my rear camera is blurry when trying to take a picture and I look at the camera and it's all foggy from moisture! Like a bathroom mirror after a shower! How can I rid of that?! The rest of my phone is working fine, just that foggy camera…

If I get a Nokia Lumia 520, can I use my virgin sim?

I currently have an iphone 4s but I'm considering getting a Nokia Lumia 520, sim-free with no contract. I'm with Virgin on a unlimited sim which my dad pays for. Pretty good, only £15 a month. Firstly, how much will it be to unlock the Nokia and, If I do, can i use the virgin sim?
Also, is it a good phone? My biggest wants are:
A good app store and battery. My Iphone sucks.