# Blackberry 10 Dev Contest
[**« Back to Contest Announcement**](https://telegram.org/blog/blackberry-contest)
To give an incentive to Telegram fans among Blackberry engineers, we are announcing a month-long coding contest ending on **December 13, 2014**. The task is to port Telegram to **BB 10** using our [open source Android code](https://telegram.org/apps#source-code).
## Conditions
1. Your app must have it's own [**api_id**](/api/obtaining_api_id.md).
2. Your code must be released under an open source license.
3. Please don't publish your **code** before we announce the winners.
5. Please don't use the name **Telegram** for your apps.
6. Please don't use the official Telegram **logos**.
## Suggested Interface
Below is a basic overview of the functionality of Telegram for Blackberry 10. We tried to provide mockups for every screen present in the app. In case any UI mechanics are unclear, please feel free to replicate the UI behavior of [Telegram for Android](https://play.google.com/store/apps/details?id=org.telegram.messenger&hl=en).
1. [Intro](/blackberry/intro.md)
2. [Login](/blackberry/login.md)
3. [Chats List](/blackberry/chats.md)
4. [New Message](/blackberry/newmessage.md)
5. [Chat Screen](/blackberry/chat.md)
5.1. [Viewing Media](/blackberry/chat-media-view.md)
5.2. [Sending Messages](/blackberry/chat-send.md)
5.3. [Sending Media](/blackberry/chat-media-send.md)
5.4. [Sending Voice Messages](/blackberry/chat-voice.md)
5.5. [Choosing Emoji](/blackberry/chat-emoji.md)
5.6. [Editing Message List](/blackberry/chat-edit.md)
5.7. [Group Chat Info page](/blackberry/group-info.md)
6. [Secret Chats](/blackberry/secretchats.md)
7. [Contacts](/blackberry/contacts.md)
8. [Settings](/blackberry/settings.md)
## Relevant Graphics
Custom icons and graphics used in the screenshots:
Official icon set for BlackBerry 10: