How to jailbreak or unjailbreak my Iphone?

I have an Iphone 4, Version 6. Every time I try to jailbreak my Iphone, (yes I remembered to jailbreak it, then "just boot") when it turns on after the "just boot" my iphone is bricked, and it just shows the apple logo. Then I put it into DFU mode, and turn it back on. After this, my iphone isn't even jailbroken anymore, and if I try to boot tethered again, I have the same problem.

My iPhone and iPod randomly stopped sending iMessages

It was working, then all of a sudden, the messages stopped sending! I turned iMessages off in settings, then re-turned it back on, and came up with some stuff about re-entering my Apple ID password, which it never has done before. And now, when I text people who have iPhones, it sends normal texts. I'm in the UK, anyone else with this problem!

Added (1). It's also saying it can't verify my Apple ID, and I haven't changed any of it, and it is still not sending iMessages.

Ways For Teen Girls To Lose Weight Fast?

I'm 15 and I guess you could say I'm over-weight (by like 40 pounds). I need some ways to lose weight fast because my sister said if I lose 20 pounds she will buy me an iPhone and pay the data charges. Help!

Added (1). Don't forget that I'm in highschool! So from 6-4 I'm NOT at home!

Having problems sending pics with my iPhone 4?

I had no problems last night but today it just says "sending… " forever then it finally says "delivery failed". I haven't done anything major since except i installed Totem Runner and Bejeweled Blitz and thats it. Any suggestions are greatly appreciated.

How to transfer songs from iPhone to MacBook?

I bought a MacBook Pro (Retina) today, and was wandering how to transfer my iTunes library from my phone to the library on the MacBook. I wish to do this through the cable (not iCloud). How do I go about doing this?

My iMessage is not working on my Iphone 4

I got the iPhone 4 around 3weeks ago.iMessage was working just fine until today. My texts were not sending at all. I have no idea how to fix this. I tried restarting my phone and resetting it and it didn't help. Someone please help! Thank you!

Added (1). I have tried everything! It is working on my friend's phone though so why not mine?

Iphone 5 back protector and case?

Hi. I'm going to order an iphone 5 black and slate. I have bought a case, but i don't know weather to get a protector for the back and put the case over that so it doesn't scratch at all.

IMessage on iPhone 5 and iPad?

I just upgraded from an iPhone 4 to an iPhone 5 just under a month ago, and I also own an iPad 2. I upgraded my *4* and my ipad to iOS6 and had no issue with either of my devices. The nice thing about iOS6 is that it combined your phone number with your Apple ID, and I was able to communicate with all my devices without a single hiccup. As soon as I got my 5 I began having issues with iMessage. No matter what I would do I could only be signed in on one device without having the other completely freak out. I normally don't have issues with technology, but this one really stumps me… Please help!

Also for reference the iPad 2 is a Wi-Fi 16gb black and the iphone 5 is 16gb white on AT&T. I doubt that any of that matters but hey, you never know.

Random people texting me what do I do?

Today I got a random text from a group that had 2 people in it. They asked me if I was their friend(Jacob) who got a different number. Not only do I not know them I don't know who Jacob is. They are pissing me off because they keep texting me after I told them to stop. I have an iphone 5 and I don't know how to block their numbers. Should I call the cops or have them blocked?