Set Up Your Existing Gmail Account on Your HTC One
If you already have a Gmail account, setting it up on your HTC One is easy as can be. Follow these steps from the Apps menu:
1Find the Gmail icon in the Apps list.
Here is the most confusing part. The icon on the left is the Gmail app. The icon on the right is for all your other email accounts.
2Tap the Gmail icon.
Because your phone doesn’t know if you have a Gmail account, it asks you whether this is a new account.
4Enter your existing Gmail user ID and password.
When you’re ready, tap Done on the keyboard.
If everything is correct, your phone and your account get acquainted and become best friends. After a few minutes, they are ready to serve your needs. If you have a problem, you probably mistyped something. Try retyping your information.
From this point on, any email you get on your Gmail account will also appear on your phone!