Here is the T-mobile Optimus F6 (LG D500BK) Official Stock Rom / Firmware Revision “D50010b_01”.
You can flash this Stock ROM to unbrick or unroot your T-mobile Optimus F6 (LG D500BK) smart phone.
File Format: .KDZ
File size: About 692MB
You can also use the LG MOBILE SUPPORT TOOLS from LG official to recover your device if you bricked your Optimus F6.
Click here for further instructionsON [TUTORIAL] update firmware through flashing the kdz files