Can I put any SIM card into an iPhone 6?

Hi, before anything else, thanks for your time. I appreciate you.

Anyway, I recently was sent a secondhand iPhone 6 by a cousin in another state. It was locked and in lost mode for some reason when it was given to me, but I had no problem restoring it to factory mode. When I did so, the only problem I have encountered so far is that the iPhone is asking for a SIM card. My cousin claims to have lost it, so I'm really just at a loss of what to do. I've found that is in fact a nano SIM card, but I want to ask for your advice on how to continue.

Internet doesn't work on my laptop?

I use a Toshiba laptop. My internet service provider is Time Warner. It works on my iPhone, but having trouble connecting on my computer for the first time ever. How come?

Iphone is dead? I dropped it in water. BUT its alive? I'm confused

So, 4 days ago I dropped my phone in water at school… It was wet throughout the entire day. But when I got home I took out my sim card and put my phone in rice for 2 days. On the third day I got my phone out and. It didn't turn on. I charged it for an hour but still nothing. Then. Like a few minutes ago I sat on it and it made the siri sound!

So is it alive? Because my screen is still completely black. I've been using siri and other things. I still get phone calls because I've tested it.

I can't exactly go to apple. They no longer sell phones like mine and I doubt my mom would get me a new one. We had just gotten my brother a new phone because he did the exact same thing. So… IS IT DEAD?!

Added (1).… Apparently not getting the question… MY SCREEN IS BLACK. It makes sounds and stuff but my screen is STILL BLACK. What i'm asking is how do you fix it?!

Recover Recently Deleted Photos iPhone 5S?

I deleted pictures on my iPhone 5S and then went to my Recently Deleted photos and deleted the pictures from that folder. Is there a way to get back those pictures that I accidentally erased?! They're not in my Recently Deleted pictures anymore, they're gone (and I think forever?). I didn't back up the photos either…
Can I jailbreak my phone or something to get back the pictures that I deleted from my recently deleted photos?

I can't add calendar events to my iPhone 6 after updating to iOS 8.4.1?

I can't add events to my iPhone 6 after updating to iOS 8.4.1. I tried Setting/iCalendar/turn off Calendar/Delete from My iPhone, but did not work. I tried restarting my iPhone, did not work. I tried Calendars/Show All Calendars/Done, did not work. I tried all these steps probably more than 6 - 7 times, but nothing worked. Can anyone help me?

Upset and worried and don't know what to do

I got told by my mum when she called me from work saying police are going to track down my iPhone. I don't want that to happen and I'm becoming increasingly worried and upset. What should I do to make sure I'm safe? )

Wet IPhone works except for mic & back camara?

I dropped my iphone in water. I set it in rice for four days.

I refuse to pay around $300 bucks for a new replacement seeing at the phone works. I can send & reply texts, watch videos, listen to music & check all apps except for the back camera & microphone.

Can i get Best Buy to fix it? I can't see why Apple can't fix iphones. I suppose thats how they make more money.

What should i do?

Can police track down your iPhone if you put up depressing posts?

I put up depressing posts and my mum called me from work saying police would track down my iPhone. I deleted the posts and deactivated my account on an app. Will they still track down my iPhone if I've deleted the posts they've called her about? Can they track me down too?