How to upgrade EVA with mileage Points?
If you want to choose the bidding route to make the upgrade, you have two options. First, you will receive an invitation to bid by default from the airline’s side in the email you provided. You can make your bid on that. Secondly, if you cannot wait & want to ensure an upgrade, you can do it yourself:
Visit the EVA Air official website.
From there, head to the EVA Bid Deal page to make the bidding request.
Select the “I am interested” option to check your upgrade availability.
Choose a price & share your payment details.
Submit an offer.
If your bidding is accepted, you will be charged with the bid amount.
Passengers can also choose to upgrade with mileage points. Using the EVA Air Mileage Upgrade feature is straightforward, but make sure seat availability and booking class restrictions apply.
Read more:- https://www.airlinesgrouptravel.com/blog/how-to-upgrade-on-eva-air