Yes, I know it is a long time since I started this thread, but I have not totally given up on the idea of a mobile setup.
I have tried various combinations to get the $forum['overrridestyle'} to return a result, but no luck so far. I wondered if it was because that data is in the forums cache, and if so, how would I access that data from the cache in a template conditional? This is the code I tried, to test it out.
I have two forums - one with an override, one without. It appears to make no difference if I set the check to 0 (no override) or 1 (override) both forums are returning the same - either x or o.