We received news that LG Optimus 3D users are now able to upgrade their firmware to the long waited Android v4.0, the Ice Cream Sandwich OS which was promised 1 1/2 years ago on the LG blogs.
To date, it is available through online update using the LG Tools and will work on unbranded phones in Germany.
If you own an Optimus 3D, perhaps it is time to give it a try and see if you could get it to install outside Germany.
Source
Official ICS is available for LG Optimus 3d..Please see
http://deepakmandi.blogspot.in/2013/06/from-many-days-i-was-searching-for-ics.html