Is iPhone screen replacing easy? Is it worth having a go?

I'm thinking to learn how to fix iPhone 3GS/4S screens but not sure if ill be able to do it? There are tutorials on YouTube on how to do it and if I do learn I could charge people for it as it is really expensive to get them fixed at shops!

Any Jailbreak for iPhone 4 iOS 6.0.1? - 1

I need to jailbreak my iPhone 4 iOS 6.0.1 and I'm having trouble. It needs to be safe and free. I would appreciate it if it was easy, too. It would be easier if there was more than one answer.

Otterbox (Defender) or Lifeproof?

I need a knew case for my Iphone 4 and I currently have an Otterbox Defender Case and I really like it. But I'm not sure which case/brand is better. I heard Lifeproof cases are awesome, but they are alittle more expensive than the otterboxes. Which should I get and why? What are the pros and cons of the Lifeproof cases and Otterbox cases?

Trouble with updating to newest iOS on iPhone, now frozen out of phone?

So, I tried downloading the newest iOS 6.0.1 on my iPhone 4. I went into the setting and wanted to update straight through my iPhone, just like I have done since that feature came. As usual, I downloaded the software (which took at least half an hour) and finally the phone shut off and the little Apple sign appeared. Then, the phone came up with the little picture of the charger with an arrow pointing to the iTunes icon, signaling to connect the phone to iTunes. I have a PC with a very old version of iTunes on it because whenever I try to download the newest version of iTunes on the computer it doesn't work. The little green bar always ends up getting 7/8s to the end and then a box shows up that says "An error has occurred". Anyway, I tried connecting my phone to iTunes as it told me, and it said that the iPhone was in recovery mode and had to be restored in order to use with iTunes. The problem here is that I'm not sure when the last time I backed up my phone was and that if I restore it the software on the iPhone will go way back to iOS 5.1.1. I'm currently using iOS 6.0. Meanwhile I'm locked out of my phone until I connect it to iTunes. What should I do? If I restore my phone I could lose everything. Does it have to do with the software on iTunes? How should I update it? I'm lost and really could use my phone tomorrow!

I don't know what I want for Christmas?

I don't know what I want for Christmas and it's driving me crazy. I've been reading through a lot of questions like this for some kind of inspiration but so far I've got nothing (except some pretty ridiculous answers). I'm 14 and not really a girly girl (whenever I even hear about $200 shoes, I nearly throw up from the stupidity). I don't need make up or hair care products. I'm way more nerdy. I love Harry Potter, and Percy Jackson, and Mortal Instruments, and Hunger Games. Basically, I love books. And TV shows like Supernatural, and Smallville, and Revenge, and a ton of other stuff that's too much to list. I have a really wide taste in stuff (you probably can't tell though). I'm not saying I don't want clothes, but mostly just as small side items and stuff.

Stuff I Have:
iPod touch
pretty good phone (don't need an iPhone or anything)
laptop
TV (old one but I'm getting a new one for my B-day which is a month after Christmas)
Xbox 360 with kinect
DS
PSP
Wii
A ton of other game consoles and games cause my older brother was a geek (I like them too though)
I got my room redone last year
I'm trying to teach myself an instrument but we already have a piano that my great aunt gave us and my brother has a guitar that he never uses so I'm good in that department.
I love books so much but my bookshelf is over flowing and I have a library card. Or I could do what I did for my birthday last year and go on a shopping spree at my fave cheapo book store.
Can't think of anything else…

DON'T:
Don't you dare tell me to give back to my community or whatever because you don't know my life, and I'm in the Hands Helping Others Club at school.
No pets. I have a wonderful cat and we're gonna adopt a dog from the shelter for my younger brother's Christmas present.
Don't say that I have too much and I'm spoiled because I got all of that over the years on different Christmases and with my money and some of it was a gift for the family. We're not bad off financially. We're not rich but we're not poor, so don't go there.
No surprises. If I say that, my mom will murder me. She hates that answer.

I'm Interested In:
A really good camera. I'm kind of wondering whether I'll use it as much as I think though… I'm into photography and art. And music. And weird things.
Maybe a Harry Potter wand or something? Yeah, I'm one of those memorabilia nerds… (into books, shows, movies, anime, and comics, etc, for anyone who has ideas)
And not really sure what else.

Any ideas? Please and thank you. (and yes, I'm specific with my questions.)

I can't text or call on my iphone 4s?

I just got my iPhone 4s a few hours ago, and it said no service for a while, but then it worked again. Now it doesn't have any bars. I know it could be that my house doesn't have ay service, but it does because a few minutes ago I had 3 bars. Now it has none. I'm with Telus, by the way.

How to do a LOW CARB diet. I need to lose weight FAST?

What foods to consume and avoid?
Is there an app for iPhone that I can keep track with?
How many carbs are recommended do low carb diet?

I'm trying to lose 10 pounds in 10 days. I know it's unhealthy but I need to fit into a dress so I don't have any other options.

Problem with deleting music from my iPhone?

My brother put a bunch of music from his computer onto my phone, and when iOS 6 came out, I deleted a lot of it (not from my computer, but from my iPhone) and it was gone for a week or so. One time, when I went on my computer, it had all the music with a little exclamation point next to it, and on my phone the words are grayed out and I can't click it or anything. I went on my computer and tried to delete the music, however, when I double click the song, it will not give me the option to delete. How do I delete these? Please answer if you have any idea, thank you!

Also, if you know about transferring music to iPhones please check my question before this one. Thanks.

Added (1). I can't delete it from my phones media, its grayed out and doesn't do anything.