How to get clear pictures on instagram?

[This girl]

So recently I checked out Kylie & Kendall's instagrams( because im following them) and they have such clear pictures, I use my iphones front camera & it isnt good quality at all. Maybe using the back camera do the trick? I don't know.. Are there settings on certain digital cameras that can upload to instagram?

[♥~Mackinzie~♥]

If you're not using good lighting, it will cause them to look not as clear as they could. In the darkness, it most likely won't look good at all. If it's dark outside and you take pictures inside using ceiling lights, it won't looks as good as being outside in the sunlight. So lighting play's a pretty big roll in that.
Another is, a lot of instagramers don't use their iphone to take all their pictures. More than likely they use a nice good quality camera, like Canon's and Nikon's and such. If that's the case, they most likely don't use the editing filters on instagram either.