What electronic should I bring with me to study abroad in South korea?

I'm more concerned about if I will be able to use skype or google voice for my family and friends.
My professors recommended for us not to bring our laptops because we will be traveling down and up the hills and mostly by foot.

They suggested in bringing an Ipad. But Ipads are too expensive for me:[
What other electronics are there I can bring with me which isn't expensive and is like the Ipad?
I want to be able to use the internet and take pictures as well with the electronic.

I have an Iphone 4s and Sprint's service is horrible. I know it costs alot more money to get service outside of the country so I won't choose that option:[

Is there a way I can use a phone to call back home?
Please let me know, thank you!

Is it safe to update my non-factory unlocked iPhone 4 to IOS 7?

When I check IMEI.info, it says my phone is unlocked. However, I know for a fact that I had a friend unlock it for me, so it isn't factory unlocked or done by a Carrier.

I'm currently running IOS 5, so it's definitely time for an update, but my phone itself is running perfectly, so I don't see the need to buy one of the newer iPhone models.

I currently am under carrier T-Mobile, and I purchased the iPhone about a year and a half ago, on ebay as a used phone from AT&T, if I recall.

Iphone 4 screen won't turn on? - 1

I dropped my iphone 4 in soda, the phone works in a way. I can still here the voice command and such, but the screen won't turn on. The little sticker in the back is pink, is there a possibility i can fix the screen?

How to get a movie from my iPhone to my computer?

So a few days ago i bought a movie on my iPhone to watch on a long car ride. To do this deleted a few apps to make some room. Now that I'm back from my trip I would like the movie off of my iPhone and on my computer but I have no idea how to do that. The movie is taking up all the room on my iPhone and I would like to use that space for other things, like pictures. So my question is, how can I get the movie I purchased from my iPhone to my computer.

Should i buy the note 3 or keep my iPhone 5s?

I have an iPhone 5s 64gb and I'm bored with it. I want to be able to multitask and use my phone as a remote and have a bigger screen. But me and my long distance relationship girlfriend both have iPhones and we use iMessage and FaceTime. So she's mad because i want the note 3 and we won't be able to FaceTime or iMessage but i tell her android has apps that are similar. She mad because i want to switch what should i do? We text all the time and FaceTime like 6 days a week. What should i do please help?

Upgrading iPhones? 5c or 4s?

I currently have an iPhone 3GS so yeah I'm due an upgrade! But what would be the best choice, a contract iPhone 5C or contract 4s?