How Do I Recover Archived Email from Gmail on My iPhone?

Having an instant access to my Yahoo and Google mailboxes is very important especially at work where communication with different trades involved in our construction project is mostly done via e-mail. Even if  I'm not in front of my PC at work,  I can monitor and respond to the communication between me, our client and the different trade contractors involved in the project using the mail app in my iPhone. There is one time that I accidentally archived an important e-mail with the latest construction plan attached to it. I needed to present it to my project manager but we didn't have access to the internet on PC so the only way i could show it to him is download it from from Gmail mailbox to my iPhone. Since i accidentally archived it, I can't see it on my inbox. Good thing I knew what to do to retrieve it back to my Gmail's inbox.
Here are the steps:
1. On your iPhone Mail app, go to "All Inboxes" view.

2. Tap on "Mailboxes" on the top left, then scroll to the "Accounts" section.
3. Select the desired Gmail account, then look for "All Mail". All emails, including archived emails, reside there. The "Inbox" view, as opposed to "All Mail", excludes archived emails in Gmail.

4. Select the email you want to move from Archive to your Gmail inbox.

You should be all set!