Why is my iPhone 5 using tons of data?

I apparently have used almost 2 GB in the last four days, and I honestly have no idea how thats even possible. Our family plan shares 20 GB between me and 3 other people and we almost go over every month and its usually because of my phone. I have the data turned off from everything except things i use on a daily basis (for example, snapchat, safari, twitter, tumblr, and maps). I have the background refresh thing off, have my email set to where it won't check for new emails unless i open the app. I pretty much looked for all the tricks to save data and I'm still using a huge amount. I'm wondering if there's another trick or if i should just take my phone into the verizon store and tell them what's going on. They suggested my parents put a data limit on my phone but my brother is honestly on snapchat 24/7 and uses less data than me. I don't get it. Can someone please explain to me what type of problem I have here.

No idea… But get n idea

  • Why is my iPhone 5 using so much data? I just got my iPhone 5 four days ago, and I've already gone over my 200mb data plan. Before I had the iPhone, I had a Blackberry Torch 9800, and I've never gone over my data plan. I use the phone the same amount as I used my Blackberry, and I'm connected to Wi-Fi throughout 90% of the day, and rarely use data. So why am I going through my data so quickly?
  • Why is my iphone 5 using So much data? - 2 I get 3gb on my plan, I have a Facebook Messenger app, whatsapp, candy crush and instagram (as does my sister) but she rarely goes over her limit, however i'm able to go over my 3gbs in 6-7 days easily. My last bill was £40 over due to data. Any ideas what it could be? How can i see what uses a lot of the data?
  • Why is my iPhone 5 using so much data? - 1 For the last couple of months my data usage has skyrocketed! I have gone from not coming close to my 750 megabytes to having to beg EE to upgrade me to a 1gb package which I'm now on round to going over double! The only thing that has changed since I got my phone was a new 4g sim a few months ago but apart from that I havnt changed any setting.
  • Why is my iphone 4 using my data when i have it turned off? I have 150 MB of data for my iphone and i was exceeding that every month so i turned the data switch off and so I can only use internet at my house from our wi-fi but it is still exceeding 150? Please help me figure out what I need to do differently so I stop getting charged so much every month for going over! I thought that if you had wi-fi it didn't use cellular data?