How to get music from my itunes account on my laptop to my iPhone?

Recently due to a virus I had to crash my laptop and I forgot to save my music on itunes.
After I got my laptop back up, I thought that if I reloaded all my music onto itunes and just plugged my iphone back into my laptop… All the music would be synced. I was very wrong and now I'm super upset cause all the music I had was deleted from my phone. The music is still on my itunes on the computer though. How can I get the music back on my phone?

Do I need to buy a new sim card for an iphone 5

I currently have a blackberry but have brought an iphone 5 off of ebay and I'm wondering wether I need to get a new sim card to go in the iphone? If I do need a new sim card, will I be able to keep my current number? And I'm on a sim only contract, will I be able to stay on that? Hope you can help, thank you!

Added (1). The sim I currently have is vodaphone and the iphone 5 is also on vodaphone

Tesco mobile vs O2 vs giffgaff?

Getting an iphone 5, looking to change my sim to something more affordable and better with around 100/200 minutes, unlimited texts and a decent amount of internet, preferably that I can connect to my ipad?

What's better in terms of.
- coverage
- reliability
- signal
- no problems/ease to contact
Are they all really interlocked to o2s signal?

I'm currently on O2, so just wondering will I be able to keep my O2 account and get priority moments and O2 Wi-Fi?

Any opinions will be appreciated, want to make the right decision with my new phone

Straight Talk or H20 for iPhone 5?

I have a factory unlocked iPhone 5 on AT&T. I will soon be switching to either H20 or Straight Talk. I like the $45 unlimited plan ($51 after fees and taxes) for straight talk with the 2.5GB of fast data. H20 has a $60 unlimited with 3GB of fast data and i feel like it's not worth it because with fees I'll end up paying more than $65 a month. But what does anyone out there recommend? They both run on AT&T's network, I do want LTE however and there's a supposed APN i can enter in the settings to get it. So what is a better choice?

What's the cheapest cell company for unlimited text and maybe call/data?

All I want is unlimited text, around 60 minutes of talk (I hardly ever call anyone), and perhaps unlimited data - I could do without this if I needed to but since so many apps require internet access these days I might as well try for it. I don't want to spend a lot of money a month on my phone bill. Currently I'm on my parents' Sprint plan but they are moving to Great Britain and so they're cancelling. What would the cheapest options be? Also, if at all possible, I'd love to get an iPhone, and I know some companies offer it either free or really cheap when you sign up with them (especially when transferring from another company) so if you know about that then that's just dandy.

YouTube videos won't load on iPhone 4?

I know this questions been already asked, but youtube just won't play on my iphone 4 (iOS 7 ) it won't work in the YouTube app or in safari. It loads dailymotion videos fine but it just won't load youtube. Is there anything I have to do to make it work? And I know for a fact that it's not the internet because I can play youtube videos on the laptop.
Is it just me?

In-Game Detention Time in HighSchool Story

On the iPad and iPhone app High school story, I cheated I changed the time farther so I could finish a quest. I have Done this once before and I was only doing it to finish quests. Then I found about the in game detention time… It was only three minutes. I was okay with me and I sat and waited. But then I did it a second time and it really scared me. So that I had to be in it for an hour… A WHOLE hour… In the game! My iPad is about to die and I don't know where the charger is so what am I supposed to do? Is there another way to cheat out of the in game detention time?

My sony viao is having wireless problems?

When i go a certain distance away from my router my wireless drops when it should be in range it is intermitting so sometimes it finds it and connects then drops again i'm in range all over my house on my iphone but my laptop doesn't find it in certain areas of my house i need to be next to the router for my wireless to work any help in fixing this would be much appreciated

Want to buy imac 2013, can you upgrade iOS?

I'm looking into buying an iMac as my windows software is slow and outdated. On the iMac can you upgrade the iOS like you can on iPhones? You know when the new iOS comes out and pretty much all iPhone users can upgrade there software, can you do that on the iMac 2013?