According to LG OpenSource Code Distribution, A new software update build MS50010i is available for MetroPCS LG Optimus F6 MS500.
The MS50010i software update is available via OTA and LG Mobile Support Tool. You can go Apps->Settings->About Phone->Software information to check The current Software version.
If your device’s current software version is “MS50010e”, you should download and install the LG Mobile Support Tool to update your device’s firmware.
How to manually update LG Optimus F6 MS500 Software:
Once installed the LG MOBILE SUPPORT TOOL, connect your device to PC, run the LG Mobile Support Tool, and follow the on-screen instruction to perform the software update.
After the update, Your device’s Software version should be “MS50010i″
Those who wish to download the LG Optimus F6 MS500 stock rom /firmware build MS50010i can grab it from below link:
Download LG Optimus F6 MS500 Stock ROM “MS50012B″:
[eyesonly level=”contributor, subscriber” logged=”in”] MS50012b_00.kdz[/eyesonly]
Wish this helps!