Why don't up to date DNS codes work for American Netflix for me?

I've tried to use up to date DNS for American Netflix so many times but it never works! I've watched videos of other people doing what I have done and it works for them, I'm following all the right steps and getting very up to date codes and all I want to do is watch American Netflix but it never works Can someone tell me why? I have an iPhone 6 and a nexus 7 and would be happy to get it on either, I know the basics like going to Wi-Fi settings and all that but it literally never works for me!

How to download songs on iPhone?

I have an iPhone and was interested in getting some pre existing songs off my computer and into my phone. How would I do this?

Pictures from Canon t5 are low quality on iphone 6s?

The pictures I take on my Canon are really good and I usually put them on my laptop and then send them to my phone but the quality of the pictures once sent to my phone is so bad and it just doesn't look as hd as it does on my camera and laptop. Am i doing something wrong?

Accidentally logged into TEACHER'S email

So my one teacher gave us a website to study for an exam and we used his school email and he gave us a password right? Well me being the dumbo that I'm wasn't thinking and logged into google with it. So all of a sudden I was on his actual email and not the website. I think he got an email that basically says I (or at least my iPhone) logged in. I don't want him to think I hacked his email or something, or was trying to. Who knows, he might not even seen it but I'm really scared.