ITunes says my iPhone 5 is in recovery mode?

Please read the entire question before answering!
Okay, so I bought myself an iPhone 5 16Gb and it worked well for a few days but just the other day when I plugged it into itunes, iTunes says it is in recovery mode. I have already tried restarting my computer, updating itunes, restarting the phone, and updating my phone firmware via the settings app. No Changes.
One who solves this shall receive 10 points.

How much is my iPhone 3GS worth? - 1

I have a black iPhone 3GS 16gb, it's blocked as I lost it but found it recently, the backlight is broken due to water damage so the screen is quite dark and can only be seen in direct light, the screen is scratched and has a tiny little chip at the side of the screen, how much is the iphone worth, I need an answer today

Will my whatsapp work on my old number if i change sim and number?

I'm from ireland and i have an irish number on my iPhone 4s but i live in beijing, and i'm moving back to beijing in a few days and there for will change sim and number.
i already have all my contacts on my whatsapp with my irish number and i don't want to loose them when i go back.
will my whatsapp work will on Wi-Fi in beijing with my irish number but beijing sim card in my phone? Basically will my whatsapp work the same way it did in ireland, in beijing, even if the phone number is different?

Added (1). Is there anyway i can't reinstall my whatsapp and it still work in beijing using my irish number, with a beijing sim and number?

Any way to start making an iphone app without paying the $99?

I have this idea for an app and I want to start learning how to make apps, but I don't want to pay the $99 yet because it's a yearly fee and I have no idea how long it will take me to design the app and I have no idea if I will give up once I've started. I'm not done highschool, but I'm determined. I'm majoring in computer science so this app will sort of be a study tool and also a hobby.

I see that Xcode 4 is free in the mac appstore, but there's also a Download Xcode 4 Developer Preview. What is this the second one? Is it just a more updated version for actual developers? Can I make a full app with the free version and just pay the $99 fee when I want to actually submit my app to the appstore?

How to install a sim card in a iphone 4 with out a sim slot?

I bought a iphone 4 from america but i doesn't have a sim slot, how can i install my optus sim card in it and would it work with my optus sim card, i bought the phone unlocked, and it said verzion, i don't know what that mean but can some one help me
if use were wondering i live in australia

Will 100 mb of data be enough?

I'm getting an iphone 4s and it comes with a 100 mb data plan, i won't be using my phone for much else apart from the facebook app, will this be enough?

What happens if you nunplug your iphone 5 on it's first charge?

Okay so I got and Iphone 5 last night and I let the battery drain and stuff and I plugged it in and the people at the phone store told me I have 2 wait 8 hours before I should use it again. So I did and I went to bed and when I woke my iphone accedentily wasnts plugged in… What do I do when this happens and will this effect my phone in anyway thank you!

My iPhone 5 battery runs out really quickly?

I just got my iPhone for Christmas and the battery is terrible. It is fast and does everything fine but the battery lasts like 2 hours. I have turned my brightness down and Bluetooth off etc and the battery is still bad. It drained 30% today in about 20 mins and it also takes about 30 mins to charge. Is there anything I can do or is there a problem with my phone.