Need something about companion upgrades.

(D.)REWARD UPGRADES
COMPLIMENTARY ELITE UPGRADES:

When is an elite eligible for a Complimentary Upgrades?

When is an elite not eligible for a Complimentary Upgrades?

How do I know if a flight operates in a BusinessFirst market?

Will I receive the complimentary elite upgrade?

What is the upgrade hierarchy for EUA's?

What is the upgrade hierarchy for Battlefield Upgrades?

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MILEAGE BASED UPGRADES

Upgrading on flights marketed with First or International First service

Upgrading on flights marketed with BusinessFirst service