As far as I know, your phone seems to be similar to the Galaxy S II HD LTE, which is powered by a Qualcomm CPU and Adreno graphics, the model's name is GT-I9210.
I tried to find a compatible ROM, but had no success. Do you know someone who has the same phone? He eventually can perform a ROM dump.
My Android History:
Motorola Milestone > HTC Desire Z > HTC Desire HD > LG Optimus Speed > Samsung Galaxy S II > HTC One X > Samsung Galaxy S III
> Google Nexus 4 > HTC One