1. Open the Settings app and click the iCloud (or iTunes and AppStore) option.

2. If you don't have an AppleID, you can click "Create a new account" and follow the prompts to register. If you already have an AppleID, you can directly enter the AppleID and password.

3. Next, you need to set the details of your email account. In the setting application, find the "password and account" option, click the "add account" option, and enter the corresponding email address and password as needed.

4. After adding, you can set more settings for each email account, such as synchronization options and signatures, and you can set the default email account.

5. At this point, the e-mail account has been established.