Does the new unlocked iPhone 5 bought in US work in India?

My brother is living and working in the US and I'm in India. The iPhone 5 is $200 more in India. In the US the unlocked version is $649 and in India it is $849. I wonder if it is possible for my brother to buy the iPhone 5 when he comes to India. Also will I be able to use it without problems or will it be only usable in the US.

How to turn off iphone cellular data?

I'm going on a cruise today and I don't want to receive texts or calls or I will be charged! How can I temporarily turn off my service? I still want to use my phone for music and Wi-Fi if possible!

Can't update facebook for iPhone 4? - 1

Hi, i have a notification in "App store" to update my facebook app, when i try to do so, it asks me to sign in with my apple ID, however, my phone was bought 2nd hand, so the previous owners apple ID shows, and it doesn't allow me to change, how do i sort this out?

I bought a iphone 4 on the three network that is currently pending to be unlock?

I bought a iphone 4 on the three network that is currently pending to be unlock from a friend.
will the phone just unlock by its self or will i have to plug it into iTunes?
will i need the original Sim card in the phone to do this or will any Sim card be okay?
how long should it take after the payment has been sent to the three network?
and how will i know when it ready to unlock or has been unlocked?

My iPhone 5 keeps dropping Wi-Fi while streaming YouTube?

I'm the proud owner of an iPhone 5. Everything has been fine. The thing that's bugging me at the moment is the Wi-Fi.
I will be streaming a film over Wi-Fi and everything will be fine then I will look and see the 3G icon appear and realize that for the past 10 minutes I have been using 3G to stream my movie.
Now in the past that was not such a problem because I had unlimited Wi-Fi, but now I changed my plan and I only get 1GB a month and you can imagine how much streaming movies kills my allowance. So this has turned into quite a problem.
I'm not running an Jailbreaks or illegal streaming sites, it's like on YouTube and on TV catch up sites. I will be watching and then it just drops. It doesn't alert me to let me know the Wi-Fi has dropped and it doesn't automatically reconnect to the Wi-Fi either. The thing is I have checked my Wi-Fi and its perfectly fine. I have been on the internet on my PC at the same time and it has continued working without a hitch so it is something on the iPhone 5 that is wrong. So I really don't know what to do now.
Has anyone else had this and worked out a solution?

Is messaging other iPhones free?

Ok right now I'm a little worried because I don't have texting and I have a iPhone 4S. I just sent my friend some texts. He has a iPhone 4.Is texting other iPhone free like my sister said? And my messages are green to my friend not like when i text my sister her texts are blue when I text my sister she has the iPhone 5. Should I be worried? And will this effect my plan? And I was texting over Wi-Fi