What would I do to prevent this?

I was thinking of coding and creating an apllication for the iPhone/Android. If I were to do so, what's the catch? How would I get it on the app store for people to download? Also, how would I make money? Obviously I'm going to do it so it's free to use, when instagram started, how did they make money? It's a free app. Also, last question, how do I make it so big name brands don't steal my idea and put it into their own? Like vine made a 7 second video thing then instagram steals their idea and put it onto their application, I want this to be prevented. Please help, much appreciated!

Added (1). Btw I'm 16 and can learn things pretty easily!

Does this mean she blocked my number?

I've been iMessaging my friend all day, (iMessage is text between 2 iPhones) and everytime i do, it says
(Friend) is Unavailable.
(Friend) is not available for iMessage.

You have to have Wi-Fi to iMessage, and I know she has Wi-Fi cuz she was on Instagram all day. Does this mean she blocked my number?

Should upgrade my iPhone 4S to iPhone 5?

My boyfriend got me a iPhone 4S in his name and when we get in arguments he will say I brought the phone for you and that gets under my skin and he got it for me cause my deposit is so high like $400. But anyways I wanna know is it worth upgrading if I have to pay $400 deposit to get it in my name and pay $129 for iPhone 5 and pay $250 to get out of the contract that my boyfriend got me. Is it worth the upgrade?

Why won't my IPhone 5 connect to my home Wi-Fi? - 1

My iPhone 5 shows that it is connected to my Wi-Fi at home and clearly has the correct password, but when I go to check my emails or try to use the Internet it says that I'm not connected or 'connection error'. I have restarted my phone, I have turned it off waited a few seconds and turned it back on, I have disconnected and connected my Wi-Fi. I can only get online if I turn my Wi-Fi off and use my data. What is going on, am I the only one having this issue?

Play iPhone through car stereo with good quality?

Right now I have a Belkin think that goes into the 30pin plug of my iPhone and other end goes into the car outlet cigarette lighter thing and it plays but its not very good quality and it doesn't go very loud, not as loud as CDs. Is there a why to get my iPhone to play better sounding music without getting a new head unit/new speakers? CDs sound great in my car so its the speakers.

My iphone 4s is taking forever to reset?

I bought an iphone 4s off of my cousin and reset it today back to factory settings. The phone was jailbroken, and unlocked. It has been resetting for about 8 hours with a black screen and a rotating circle, is that a good thing, or should I be worried? Why is it taking to long, and will it stop any time soon? Also, will the phone still be unlocked after everything is done?

IPhone 4 dock connecter super thin?

So I had never really payed attention to it but my friends dock connecter broke and so I looked at my iphone 4 black dock connecter. And it's pretty thin! Is that normal? I'm kinda like worried about it being messed up, but it still charges and every thing. Also could my 1 year old iphone 4 last me through 2 years of high school?