My iphone 4s can text, no service?

So my dad bought me a brand new iphone 4S. However, where-ever he bought it from, it was AT&T. So when I tried to put my T-mobile sim card inside, it did not work.

There's a sub card or something until you put your real sim card inside though.

I would use the iphone to play games and entertainment since i can't call or text (at least what I thought)

My little sister called me today, asking if my iphone had unlimited texting, and I was thinking "wtf."
I tried calling with it, but it didn't work. However, texting does work.

Can someone explain this to me? Is it okay if I allow her to continue texting my other cousins with it? (They also have a iphone if you're wondering)

Added (1). When I tried putting in my T-mobile card, it said the carrier was not supported and it would stay on that screen. So I would put the other sim card back it(the sim card is orange or something, and i'm pretty sure it's a temp sim card)

Added (2). And I'm wondering, if I let her continue texting. It wouldn't really be charged on our bill, right? If I'm thinking correctly.

How to get netflix on TV through iPhone 4S?

I just bought the composite av cable from Apple and can't figure out how to mirror my phone so I can watch videos on the tv. Are there any apps out there? Or setting I need to change?
My phone is running iOS 6

How to get an APN or VPN on my iPhone 3gs?

OK. So today my boyfriend bought an iPhone 3gs off of Craigslist, the guy he bought it from said that it could be flashed to Cricket and that it was unlocked. When we got home, we had called around asking how much it would cost to flash it to Cricket and one of the people said that we couldn't flash that type of phone over to Cricket, but we could use T-Mobile or NET10.So we went to T-Mobile, the guy at T-Mobile said that the phone was locked and that there was nothing more he could do for us. So we went to Wal-Mart HOPING that if we got a NET10 sim card and everything, that it would work. Well, it worked but he needs the APN or VPN in order to get on the internet and send and receive pictures and what not. We do not not know how to get it on there. The question is HOW can we do this?

My iPhone 4S is deleting my notes?

Why would my iphone delete most of my notes I have made? I'd have three or four different notes and then sooner or later, some of them get deleted. Why?

Problems with iphone 5 battery?

My iphone 5 keeps shutting off sometimes when the battery is as high as 30%. I usually close all my apps but I was running and had endomodo app running while music was playing. Any ideas it was around 25 to 30% when it shut down

Added (1). @FilipinoKid15 what do you mean boost?

Christmas List idea for teen girl?

I'm 16 years old and I can't think of anything for a gift! I have an iPhone, iPad, TV and Mac laptop already. I love makeup, sports (but I'm still very girly), shoes, clothes like urban outfitters and tobi. Do you know of any clothing stores like these also for possible gifts? Please help me think of some gifts for this Christmas I need help!

Note 3 vs lg g2? Which one is RIGHT for me?

Ok…
So i'm 17 years old and i almost check my fb and watch videos on youtube everyday. I don't really play games. I like to get phone which is faster and i can customize. I care about finger prints alot. I want phone that will work perfect and fast for 2 years alteast because of contract. And i never had andriod phone before i have iphone 4s now. It is getting so boring because you can't do anything with it because of slow IOS 7.
I want good battery life too.

Can i update my iphone to ios6?

I have an i phone4 and until now i'm on ios4. I have a jailbreak too… And i'm wondering if i can update to ios6 instead of 7 as in seven i may lose some of my main apps that are not yet updated.
so my first question is can i update to 6?
second. How about the jailbreak?
and if i can. How it's done?

Why isn't my Facebook chat on iPhone working?

I do all the app updates from the App Store for all my aps including Facebook on my iPhone 5. Recently I've noticed it doesn't show the actual online people, just favorites and then the people who are on mobile. But occasionally a green dot or two. A few times the green dot actual online section comes back but it shows a very very small amount of people online even during the peak hours which I know is incorrect. Also the people who are online by phone or mobile has stayed at the same constant number. Is this a glitch or how do I fix it?