I want to update my Micromax A87 Android 2.3 Gingerbread to Android 4. ICS Please tell me step by step how can i install Android 4 ICS to my Android 2.3 Gingerbread, I am new to Android but i can do this, if some one help.
I am afraid, it might not be possible.

First of all, the ideal requirement for ICS to run on any phone is Dual Core processor, and your phone does not have good processor.

Secondly the ram, your phone has only 256MB of RAM wherein for ICS to work smoothly, it requires atleast 512MB RAM.