AT&T iPhone 6 Plus on T-Mobile/Sprint/Verizon?

I have an AT&T iPhone 6 Plus (Model A1522, MGAU2LL/A) and planning to sell it but I don't know if it will work on the other carriers. Will my phone work on the other USA wireless carriers?

How to get this movie on iTunes?

I recently bought a movie with a digital download on it. I wanted to download it to my iPhone, but it says the code is invalid. How do I get it on my iTunes? Here's the card (the code has been photoshopped out)… How to get this movie on iTunes

What would happen if I take my SIM card out of my iPhone 5S and put it back in?

I'm going to China in 13 hours and am bringing my iPhone 5S. My parents were worried my iPhone would get charged in China because we don't have the international plan so I asked my provider. He said that if I don't call or use my phone data then it shouldn't charge me but I should take out my SIM card just in case it gets signals and starts using data or something. I know that if I take the SIM card out, I would lose signal but the apps on the phone still work as long as it doesn't need Wi-Fi. I was wondering when I put the SIM card back in when I come back to the USA, would anything happen?

Anyone here still using their iphone 4?

Since the iphone 6 is out… I've seen less and less people using the iphone 4… I don't see anything wrong with it but is it weird to still be using one? I go to a private school so when I had to take the regents, everyone was supposed to hand in their phones and I discovered that I was the only one in the room with an iphone 4… Is it because it was a private school? I know this is a bit silly but… I'm probably going to upgrade when the newest iphone comes out in September…

Added (1). No negative comments please, I just want reassurance

RODE Video Mic Pro or NTG-2?

I'm planning to do a short film, mostly out doors, using the Panasonic gh4 and I was wondering what mic I should get. I will be holding it on a boom pole not attaching it to the camera. So out of the video mic pro and the ntg-2 (will most likely get a dead cat) which one should I get. Also I know that the video mic pro isn't the gh4s most favourite mic.

The second question is will I be able to run the mic into my iPhone and record sound on that, or if I have to, record the audio on my laptop, buying an external recorder is not an option, so if one of these mics can't do this then it is out of the question, unless it can record into the gh4.

Anyway any help will be much appreciated.