My iphone 5 battery is draining too fast?

So i want to know if you think it was my mistake cause i bought it on friday and i was marveled because the battery life was so excellent. Today i went to school and forgot to unplug my phone from the charger and i used it 20 minutes and battery was down by 20 percent, Was it my fault? I always left plugged my iphone 4s and battery was way better than my 5? Any person experiencing this problem?

Do I have to get a plan if I buy and iPhone 4S?

I'm wanting to get a iPhone 4 but I don't really text or call that often. So I was wondering if I could still get an iPhone but still not have to have Wi-Fi to use the Internet? And to be honest another reason I want an iPhone is because of all of the cute iPhone cases, hehe.

Is Releasemycode.com a scam?

I would like to unlock an iphone and my friend told me about this website. Has anyone used it who can tell me if its not a scam? And what info do you need to unlock it?

Added (1). And please say why its a scam thank you:]

Iphone texts received on 2 phones?

I updated my iphone 4 to the latest ios software on itunes and now when i text people and they reply, it shows up on my dad's phone! How can i change this so when i send and receive texts, it's only on my phone?
It shows the texts i send and what they reply on both of our phones!

IPhone 5: Apple care+ vs good protection/case?

I just ordered the iphone 5 but i'm not sure how to protect it. I could either put no case on it and purchase apple care+ for $100. This will cover up to 2 incidents of accidental damage for 2 years with a $50 deductible. Or i could just invest in a case case and screen protector. I'm considering the spg glass screen protector that will prevent scratching and screen cracking from a drop. I would also get an spg bumper case along with that to protect the sides of my iphone as well as to absorb shock in the event of a drop. These 2 together will run me about $70.

I looked into at&t insurance and they also cover theft but they charged $7/month + a $200 deductible. Not worth it in my opinion.