I found a white spot on my iPhone?

I just bought my iPhone 6S plus a few weeks ago and just found a white spot under the volume buttons. It won't come out but it isn't a scratch as i can't feel any thing. It seems like it is the metal itself.

Added (1). I wasn't sure what to do. Is there any way to get to get it out?

Do iphones really use a lot of data?

Currently still stuck with an iphone 4 since my last phone broke but IIm usually always on Wi-Fi as well unless iim traveling. But i'm thinking about upgrading to a 6s or maybe just a 5. Currently I have the unlimited data plan on Verizon but I really need to upgrade my phone and so I really would like some opinions on data usage!

Invalid SIM card in my Unlocked iPhone 6s Plus?

I bought a new unlocked iPhone 6s Plus, I also have a Sprint locked iPhone 5s. I tried to put my Sprint SIM card from my 5s into the 6s and it says invalid SIM. Will the 5s card not work in the 6s? If so, why not? Can I get a new SIM card from Sprint so I can have the same number?

What Should I Ask For Christmas? - 2

I know its kind of early to be asking this but my parents want to know early.
These are the options.

Option 1: iPhone 6S (I currently have an iPhone 5S)

Option 2: Northface Jacket and Rainbow Sandals

https://www.thenorthface.com/shop/womens-osito-2-jacket

https://www.rainbowsandals.com/ProductDetail/301ALTSBDKBRL010_Flirty-Braidy--Single-Layer-Premier-Leather-With-Arch-Support-With-a-Braided-Strap

How to reset restriction passcode on iPhone 5s?

My dad got an iPhone 5s from a friend who didn't need it, and he tried to reset/erase everything so he wouldnt have to use the phone with the friend s stuff. But when we tried to reset it we couldnt with the restrictions passcode blocking us. We asked the friend and apparently he doesn't know the passcode as well. We need to find a way to reset or recover the passcode, but without Apple ID (because we don't have that) and iCloud

How to connect my iphone 5s with my mac book air?

Ok so this year i have bought a new mac book air and a new iphone 5s and i would like to connect ehm to each other so that when i receive texts on my phone it goes to my computer and i want to send messages from my computer and i want my computer and phone connected how do i do that?