I have an epic 4g touch (Sprint) and it was working just fine yesterday! When I would plug in the phone it would give me the option of MTP or the other photo transfer option. I noticed the computer acted a little funny about it, though. I've scoured the net the past 24 hours searching for solutions and I've tried everything. I have tried 4 different usb cables (including stock), different computer, usb ports, rebooting, hard resetting, usb debugging unchecked, installed the samsung usb drivers, uninstalled the drivers and tried again as well as a full wiping and restore (tried that twice). It's not the cable because I connect my Moto Razr Maxx HD and it recognizes it immediately. So I know it's not my computer or the cable itself. There is something in the phone. I do remember checking for system updates and attempting to update the firmware, samsung software, profile and PRL. Only the profile and PRL options seemed to have updated. Is that what could've corrupted the phone? Is there anyway that I can restore the files on the phone to its original state through the phone itself (It still has 4g connection so I can go online with it)? I've checked online and everyone seems to say the same thing, "Try a different cable" but I've tried 5 already and my computer still won't acknowledge the phone. Also, when I check in the device manager of my pc (Windows 7 64-bit) I can actually see a new device called "Unknown device". So what I did was install the drivers to my computer then attempted to update the driver for that unknown device, which of course is the phone itself. When I tell it where to search for the drivers (in the installation folder for the drivers /SAMSUNG/usb drivers) it says it cannot find the driver for my device! So now I'm at the end of my rope and I'm hoping that someone on this forum knows what could possibly have changed between yesterday morning and yesterday early afternoon when all of a sudden it stopped recognizing my device. Thanks for any suggestions! Adding: I also tried to install the driver by clicking on "Let me pick from a lis of device drivers on my computer. I went to "portable devices" then there were two choices for SAMSUNG Mobile MTP Device. I tried both and they both said the same thing: "Windows found the driver software for your device but encountered an error while attempting to install it. This device cannot start. (Code 10)" Why does it say "cannot start"???? It's plugged in as I type this and it's charging the phone! I know the problem is somewhere with that message but I just can't figure out what it could be.