This appears to be the most relevant current thread for my question.

I have a multi-sector, multi-carrier itinerary booked through an online agent. EK is not the first carrier, nor the ticketing carrier. Two sectors are on EK in F on the 777.

This will be my first time on EK and I have next to zero knowledge of the airline.

Ideally, I'd like to change both EK flights to the A380. According to the schedule I can do this and still avoid changing the current transit in DXB to a stopover.

1. How can I get the detailed fare rules for the ticket I booked?
2. I understand it's not possible to change from an F bucket on the 777 to an equivalent First seat on the A380 as F doesn't exist. Is this correct? If so, does that mean that changing from First on the 777 to First on the A380 is not possible?
3. If it is possible to change, can it be done with triggering a re-price, preferably by the entire itinerary is commenced? Alternatively, is it possible to change once the first sector (which is not EK) is flown?