Well I think I will get to experience the joys of the "is it a new 777 or not" for the next few days until my LHR-SFO flight. Changing from 77Q to B777 at the moment with the 77Q showing as the seat map - the fun being whether I will be able to change seats at check-in time - but I really want to turn this auto check in feature to off but cannot.

So my question about auto check in for those that have used it: does it only get enabled if you check in online for a flight and only work on the return segment ? ie. I do not want it to be enabled for the first segment as I expect the 777 seat fandango.