Hi there. I have a LG Rumor LX260 on Sprint Network. I am currently having issues with the phone and my computer with the USB cable.
I think the phone has some kind of firmware corruption or something. Here is what happens when I plug it into the USB cable, which is connected to my computer.

I open up BitPim....BitPim detects the phone...phone goes into on/off connected/disconnected boot loop infinitely.

I open up LG Download....phone stays on...displays "DIAG_VERNO_F: OK" "DIAG_STATE_F: OK" "DIAG_STATUS_F: OK" "NV_READ_F_PACKET: OK" looping messages infinitely.

I open up LG Mobile Update: phone detected...phone version not supported.

The phone displays a blank white screen when the Menu button is pressed, and crashes and restarts when I hit the "Contacts" button. However, If I hit the "Messaging" button, I can still access all the menus.

I have all the drivers installed, and I have the backup firmware downloaded from here. My computer is running Windows 7: Ultimate.

Any ideas? Thanks!