Originally Posted by svikramajit
I unistalled the Samsung USB Drivers that I had installed. Rebooted. Changed the cable. Cycled through different modes. But only PTP worked.
I already had Kies on my PC. But the phone didn't connected to it too.
It's easier to troubleshoot if everything Samsung is Uninstalled (Samsung drivers, kies, all of it) and then reboot, reinstall Samsung drivers, reboot again and plug your phone. If it doesn't recognize or Windows doesn't automatically install the drivers, you can go into device manager and find the device (it'll have a yellow exclamation point of the drivers aren't installed) right click on it and go to properties, then the driver panel. It should give you an potion to update drivers manually, where you browse your computer to the folder where you downloaded the drivers. Then it should work.
If you're still having issues with it, connect it normally, then in recovery mode, then in download mode. It's rare but could be all the mess with software corrupted your phone's drivers, internally, in which case I'd flash the stock rom AGAIN just to be sure.