What iPhone should I purchase and why?

I know I don't want the 5/5s. I also DON't want the 6splus (too big and too pricey). So its between the 6, 6 plus, and 6s.

I heard the 6 plus bends which isn't good.

My Iphone 6 has already used to much cellular DATA

My Apple Iphone 6 is on ATandT. Its 16 GB. My family shares 15 gigs per month. 5 of us share the data. It had just restarted 2 days ago, and my phone has already used 6 gigs! My Wi-Fi hasn't been working, and when i go onto youtube or something, i come back out and my Wi-Fi is off. I have reset my Phone, I have updated my phone, i have done everything possible. The only thing i use with DATA is my Spotify and some instagram. I know spotify takes up a little DATA, but this is just ridiculous.

How to fix my iphone 5c screen?

Ok so I dropped my phone earlier today and it wasn't a really bad drop or anything but when I picked my phone up and checked the time my phone screen had all of these lines, the best I could describe it is like when the TV has an error if you get what I mean. Has anyone else had this problem before? I'm planning to go to the apple store on the weekend to get it fixed but does anyone know if there's a way I can fix it and how do they fix it in the store?

Can I recover deleted photos?

I had photos on my iPhone 5s but it broke so i replaced it. I did not save them to my computer or to my icloud. Is there any way of recovering them?

Is apple-wholesale-store Trustworthy?

Want to start buying iphone 6s and 6 plus for resell but need a reliable website that sells genuine apple products! Please let me know if anyone knows if this website is reliable. Or if anyone knows a website that is.