Switching from iPhone to Galaxy S4? - 1

I've had my iPhone 4 for about 2 years now and it broke and it's totally messed up now since I dropped it. Since I'm eligable for an upgrade at ATT, I was wondering how difficult it would be to switch from Apple to Google. I've had my iTunes account for years and have bought many many apps and songs and I wanted to know if I can possibly transfer all my stuff to a Galaxy S4 if I were to purchase one. I also wanted to know if the S4 had an app like the music app on iPhone.

Should i buy an iphone 5 or xperia z ultra now? - 2

My birthday is next week and I was thinking of The iPhone 5 or xperia z ultra, I'm used to huge phones (I currently have Galaxy Note N7000). Don't suggest, Galaxy S4 or LG Phones as I prefer high quality phones over plastic phones. I don't care how much power is there in Galaxy S4, my girlfriend just got it and it has lagged atleast 5 times in the 4-5 hours I have used it. Basically, as the next iphone should launch pretty soon, should I go for xperia z ultrat? But, wouldnt it be very huge. Also, wouldnt the next iPhone be almost identical to this one.

Additional Details
Also, if it helps, I have an iPad 4th Generation and Alienware M15X. No Macbooks or Macs as I prefer Windows due to the fact that almost my whole life I have used windows 98, xp, vista and 7. I did use one macbook pro when I was studying in MIT(around end 2010), but I switched back to windows almost two - three months later.

Why isn't my iTunes syncing?

Hi, basically whenever I try to sync my iPhone (3GS) a message appears saying something along the lines of "couldn't sync iPhone, run the installer to uninstall iTunes and then install the 64-bit version". I have done this multiple times to be met with the same message. If you could send me a link to the iTunes that I need, or give me any requirements for iTunes, it would be much appreciated. By the way, I use Windows 7 and have an Asus laptop- if this is any help.

24 month iPhone contract but phone packs up before the end?

Have a 24 month business contact with O2 which ends March next year. My insurance is with my bank.
Although the phone is in pristine condition, it's had heavy use. The battery won't last more than an hour, messages are mixing up, it constantly crashes.
I need to use this for a further 6 months as my business line. Will either O2 or my insurance help as its not (really) my fault?

Should I delete all my social network account for a better life?

You all know Facebooks, Twitter,. Youtube etc. We waste all of our time on it. We spent too much times on it. I also get kinda addicted.
I'm planning to shutdown all of it! Except for emails and phone basic use. I have an iPhone. It really fun and make me happy, but i feel it waste about 80% of my time on it.

When do i shutdown all the network. Does it make my study improve and my life?
Is this a good idea. Tell me your opinion.

Which Wi-Fi Router works best with a Zoom Docsis 3.0?

I set up my Zoom Docsis 3.0 Modem and connected it to my Apple Time Capsule which I use as a Base Station for Wi-Fi. Everything works fine, except I need to restart the modem everytime someone wants to join the Wi-Fi network. It's not a terrible inconvenience to have to restart the modem, but would you have any idea why that might be happening or how I can fix it? I suspect that the modem and router might be incompatible and both are possibly trying to assign IP addresses at the same time and that's causing the need to restart the modem. When I restart the modem, everything works fine, until someone tries to connect to the network from another device (eg.iPhone, iPad).

Why is itunes not working properly?

Last week i was able to see all the songs i downloaded on my iphone
that was when i had Wi-Fi

now when i have no Wi-Fi i can only see songs that are on my iphone
plus those songs i couldnt see are on icloud

are all the songs erased or can i not see them cuz i don't have Wi-Fi

How to improve video quality on Iphone 4S?

I got a video from my friend and its video quality is horrible. He texted it to me and I saved it I just want to know is there a way to improve the quality of the video.