How many GB should i get for my iphone 5?

I'm always on facebook, instagram, or twitter. I picture message, text, facetime, Skype, all that kind of stuff being on the internet. I've looked on att, tmobile, and Verizon for plans but I'm not sure how much gb I will actually need or use. If anyone could help me decide how many gb are too much or too little or a good amount to get so I won't go over my plan that I choose.estimates are good for how much I should get.

Social networking apps don't take up a lot of memory but if you download tonnes of games and or movies get it with as much storage as possible.

Ok if you connect to Wi-Fi at home then you don't need that much. If you don't have any sources of Wi-Fi I would say 5 gigs or more. Because from what you are saying you use your phone all the time and didn't specify if you have Wi-Fi or not. If you do have Wi-Fi then i would go for about 2-3 gigs. That is a lot of data but like you said if you use it a lot OUTSIDE of a Wi-Fi area then it can rack up pretty quickly