The Optimus Quest LTE(Model LG L25L) was shipped with Android 2.3 OS, Stock ROM revision “L25LV10a_05”
LG Optimus Quest LTE(Model LG L25L) who rooted or bricked their devices may need this stock rom “L25LV10a” to restore the device back to stock.
Some one asked that if the LG L25L (Optimus Quest lte) device will receive ICS update in future. we are not sure either.
To download LG L25L (Optimus Quest lte) Stock Rom, please visit http://lge-phones.org/check-latest-lg-official-firmware, Input your imei code there and then click download to grab the firmware.
Wish this helps!