Why won't my iTunes recognize my iPhone 5c anymore?

My iTunes used to always recognize my iPhone, even my laptop right away had something pop up for it when I plugged it in. My brother recently got a new iPhone so he signed into his iTunes and ever since nothing happens when I plug my phone in besides charge it, same for my brother. Is it because he signed in or also because I just updated iTunes? I've tried restarting both my iPhone and laptop.

Have you rebooted your computer with the iPhone connected to the USB? That's what I did this one time my iPod Touch wouldn't show up.

  • Why won't my laptop recognize my iphone? I've used the usb to charge it from the wall and it works perfectly fine but now i'm trying to update my songs so i tried plugging it into my laptop and connect to itunes but it doesn't recognize my phone or show up that its charging (i'm using the same usb)
  • Why won't my new computer recognize that my iPhone is plugged in? I recently got a new computer, but all of my information for my iPhone is on my old computer. When I plug up my iPhone to my computer, it doesn't register that it is plugged in. Nothing is wrong with my charger and nothing is wrong with my computer. I don't know what to do to get my information from my iPhone onto my new computer and to my iTunes.
  • Why my computer doesn't recognize my iPhone anymore? When i plug my phone into the computer, it charges but it doesn't show up on my computer or itunes. I TRIED things like youtube videos and more but it still doesn't work.It worked before but not anymore.
  • Why does iTunes not recognize my Iphone 5? My phone has stuff on it already and is already set up. But when i plug in my iphone, a screen pops ups and gives me two options: set up as new iphone or restore from ipod backup. How do i just keep what i have on it now and not have to restore an ipod backup or start as a whole new phone?