my computer is not recoginizing my phone but charging it 3 days ago my phone would connect to my computer perfectly fine, but now it isn't working. At first I thought it was the usb cable, but after purchasing a new cable it still doesn't work. It isn't my computer because my dads samsung connects to my computer. I noticed usb tethering is off and greyed out. Is that the issue? If not, what is?
Depending on your computer os and your phone. After connection via usb, theres normally a popup in the notification bar where you are able to choose from various usb modes. If that won't work, it could be a driver issue. Samsung devices tend to have Samsung Kies installed, which ships the usb driver.