Lg k500dy frp don with lgs still con't remove
 

Card found : 9F9B1410 , v0136
Infinity-Box LG Service Tool [ LGS ] v1.03

Operation : Reset Settings/Format FS [ v1.03 ]

1. Power Off Phone , Remove battery , Insert back
2. PRESS and HOLD VOLUME UP KEY!
3. Insert USB cable, wait until Download mode screen will appear

Wait for phone...
Connection opened successfully!
Waiting for loader ...
Handshake passed!
Collect info...
Prepare passed, mode 0x01
Boot done!

Format UserData
Format Cache
Format done
Erase sFRP#1 Ok!

Reconnect Power/Cable!

Done!
Elapsed: 00:00:59

That means not supported ATM