How to reset Iphone 5 to factory settings?

My iphone 5 was "borrowed" by a mate who thought it would be funny to put a passcode on it. Now that I have it back I can't get into it. How do I either get into my phone without knowing the passcode or reset it to its original settings?

IOS 7.1.1 has messed up my iphone 5?

I updated it the day it came out and it has totally messed up my phone. Every 15 minutes it restarts and it's very frustrating as I'm always on facetime to my boyfriend who lives far away. I've tried twice to reset my phone to the "new iphone" default and it's still doing it. I've tried turning it off and on multiple times, I've tried a lot. I don't know what to do, as I'm not technical at all and a lot of the advice that has been given to others I haven't been able to follow. Any help?

I want bigger breasts? I'm so disgusting? - 1

I'm 14 years old and I have major self esteem issues.

To sum it up:
I hate the way I look, I wish I were at least a year older than I actually am (I turn 15 in July, ugh.), I'm just overall disgusting and I'm sitting here bawling because of the stress that I put myself through every single day even over other things. I'm so hard on myself it isn't even funny. I fend for others and don't usually get the same in return. I'm so angry. I want to be prettier. I know that you'll say "You're only 14! Don't rush to grow up." Well, yeah, sure I'll feel horrid when I'm older and wishing I were younger but this is now. This is now. I want bigger breasts now, I want to be prettier now, I want to go to that One Direction concert but no! I guess not. My friend whom is 15 has bigger breasts, an iPhone, gets to go to the concert, she's far more pretty than me (She's Italian). I guess I sound pretty immature and ungrateful but I don't know what to do anymore. Just please, help.
I also started my period about two years ago and began puberty at a very early age. I want to know whether my breasts will grow larger and if so- how soon? That is one of the main reasons I have such low self-esteem.
I forgot to mention, well I thought I did, that I have a 34B bra size and my mother is a D or something I believe. Most women in my family have very, very large breasts so.

Is it worth getting the iphone 5c?

I currently have the iphone 4 but it's getting quite slow and I want to change it. I'm thinking of getting the iphone 5c but I'm wondering if the 5 may be better. What are your thoughts?

IPhone 5s not connecting to home Wi-Fi but connects to other Wi-Fi?

I enter my password correctly and it loads for a few seconds until it says it can't connect to the network but when I'm at school or at a friends house I can connect to their Wi-Fi just fine. I have tried to set it to static and reset the network settings but none of those have worked.