> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://helpdesk.meminto.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# How to upgrade with an coupon code?

|| In this article you will learn how to upgrade a coupon code on the web or on your mobile phone, for example, to turn a mini-book into a digital book.

1. Open your Meminto book.
2. If you are using a computer, click **"My Books"** in the menu on the left. If you are using the mobile app, tap **"Book"** at the bottom of the screen.
3. Open **"Book Details."**
4. Enter your coupon code in the **Upgrade Code** field. On the mobile app, scroll down to the bottom of the page to find this field.

![](https://storage.crisp.chat/users/helpdesk/website/-/d/d/8/5/dd85864b645c5800/605-01_yz0s58.png)

* After entering the code, wait a few seconds.
* You will be taken automatically to the Upgrade Confirmation page.
* On that page, you can choose additional questions to add to your book.