You'll need to call the number on the back of your credit card. Explain to the phone representative that you want to upgrade your card to the Quest card. Be clear with the agent on the phone that you want to change to the new card.
People Also Ask
Usually, to change credit cards, you need to cancel your old card and apply for a new one. Both of those actions can impact your credit score. When you downgrade a credit card, however, your credit is not affected. Card issuers only let you downgrade to credit cards in the same product line.
You can request a PlusPoints upgrade at booking or after you've been ticketed. To book a new reservation with a PlusPoints upgrade, go to advanced search on united.com and select PlusPoints upgrades from the Upgrade Type drop-down menu.