Switch from iPhone 6 to iPhone 6 plus on same carrier?

So I just broke my iPhone 6 screen. My dad has his old 6 plus lying around (He got an s7 the other day). We both have Verizon. If I wanted to switch phones, but retain my phone #, could I just put my SIM card into his phone? Or is it more complicated than that?

My PC keeps losing internet connection after 5 minutes every time i re-plug my Wi-Fi USB thingy?

I have a USB stick that I plug into my PC with, It then allows me Wi-Fi connection, but then it just loses connection. The internet in my house is working fine, I can browse on my iphone and my brother is Playing league of legends and has no problem at all.

what is this madness? I have to replug my USB every 2 minutes and then my Wi-Fi just dies. I have to continuously re-plug my Wi-Fi stick in order to revive my internet connection.

so confused…

Added (1). Once I connect my stick, I get 2 minutes of Wi-Fi connection available, then it loses connection.

I'm guessing as soon as I restart it, I get to its peak? Then it just goes down and dies off?

I deleted an app on my iPhone and it won't let me download it again?

I wanted to download an app I deleted (LINE) but when I press on the cloud, it won't let me download it again. All it does is comes up with the download symbol and then switches off again in a second. I decided not to bother with that app, but suddenly I realised that is what I contact everyone on, so it is a big problem.

I then wanted to download snapchat and it did the same thing. Any tips or how to download it again?