How to send a group msg on iphone?

I mean one where everyone can talk to everyone, not just me talking to everyone and everyone only talking to me.
For example, friend A can talk to friend B, and I can talk to friend B, and friend b can talk to friend c, and so on.

I didn't mean to link my iphone to someone's laptop?

My teacher plugged up my iphone to his macbook, and when i checked to see what radios i had it had it under his name, so does he get everything i downloaded? And how can i take his name off? Or is my iphone forever on his mac because i never linked up my iphone to anything before. I NEED Help.

I need cash for my iPhone 5, is UpgradeSwap the best way to get it?

I want to sell my iPhone 5 for AT&T but don't want to wait around for someone to buy it. I want money as soon as possible. UpgradeSwap.com says they'll pay me today for it through PayPal. I know some sites say they'll pay today but it's not true, I'd have to wait till they received the phone in the mail… As I said before I don't want to wait around for the money.

Would you guys trust this site? I've seen them on several tech blogs so it would seem they're legit.

Cent delete one specific text message on iphone 5?

I have a 6GB conversation with my boyfriend, but its taking up way too much space. Every time i try to delete the conversation, it disappears but it doesn't allow me to send or receive texts from anyone. I have to restart my phone and the conversation is back. That is the only way i can text people again.

How do i permanently get rid of our conversation do i can get more space on my phone?

Good video editing software?

I would like to know what's some good video editing software like iMovie. I don't have a Mac, but it's on my iPhone an I really like how it works. Is there anything, preferably free, that I could use to edit my videos. I'm an aspiring youtuber and I need some good video editors.