For 4.1.2 only rooted phones
Download the ZIP from following link
Optimus Vu2 4.4.2 Kitkat
Download Recovery reboot apk
1)Place your zip and apk to your phone
2)Run the apk
3)Install the recovery reboot from apk
4)Choose Install zip
5) from sdcard
6) choose the ZIP file
7)wait
8)wipe, reset your phone
9)reboot
Some Sample pics of F200L is here:
Download the ZIP from following link
Optimus Vu2 4.4.2 Kitkat
Download Recovery reboot apk
1)Place your zip and apk to your phone
2)Run the apk
3)Install the recovery reboot from apk
4)Choose Install zip
5) from sdcard
6) choose the ZIP file
7)wait
8)wipe, reset your phone
9)reboot
Some Sample pics of F200L is here: