BYD's rotating DiLink screen is powered by full-fledged Android. Due to regional vehicle regulations (Australia, Europe, Latin America, Southeast Asia), direct APK installation may be locked out-of-the-box. Follow our verified guides to safely unlock app permissions and run the Dotix Companion App.
Uses native Android developer options; does not compromise car ECU or battery management.
Completely reversible at any time via simple app uninstall or factory reset.
Requires only a regular USB flash drive (FAT32) or a smartphone connected to car Wi-Fi.
Fully verified on Atto 3, Seal, Dolphin, Sealion 7, Tang, Han, M6, and Song Plus.
Watch this highly-rated 2026 comprehensive walkthrough by tech specialist AnonyMods. It provides the most reliable procedure for unlocking app installation permissions on the latest BYD DiLink firmware.
By AnonyMods • 25,000+ views • Updated for latest firmware builds.
Format your USB drive as FAT32. Download the official Dotix Key APK and place it in the root directory.
Plug the USB drive into the car's Data USB-A Port under the center console. (Avoid rear charge-only ports).
Open car File Manager -> USB -> Tap APK. Enter verification code 20211225 if prompted.
Launch Dotix App, grant Accessibility Service for hotkeys and Bluetooth LE for the Dotix Key button.
Choose the tutorial method that matches your vehicle's market region and DiLink firmware version.
By Vlad Landa. The most popular tutorial on YouTube demonstrating the standard USB flash drive procedure on DiLink 3.0 / 4.0 vehicles. Covers how to bypass safety prompts smoothly.
Highlights: File manager navigation, USB formatting, instant installation without PC.
Applicable to: Atto 3, Dolphin, older Tang & Han models.
By BAOLAB. Shows how to trigger the hidden Engineering / Factory Menu using the built-in car Calculator or Phone dialer app, enabling the USB debugging switch on newer DiLink systems.
Secret Code: 20211225= or 20201205=
Applicable to: BYD Seal, Sealion 7, updated DiLink 4.0/5.0 cockpits.
By Tall Paul Tech. The definitive guide to wireless sideloading. Connects the car to a phone hotspot and uses ADB commands or the Bugjaeger mobile app to push APKs over Wi-Fi.
Advantage: Works even when car USB port is software-locked from installing files.
Tools: Android Phone (Bugjaeger app) or Laptop with Wi-Fi.
By Byd México. Tailored for Spanish-language vehicles in Mexico, Colombia, Chile, and Latin America. Demonstrates permissions and USB loading on Dolphin, Seal, and King.
Language: Spanish (Español) with clear on-screen UI buttons.
Applicable to: Mexican and Latin American export models.
By Bruno Couto Gomes. Step-by-step tutorial recorded in Portuguese for Brazilian BYD owners (Dolphin, Seal, Song Plus, Yuan Plus).
Language: Brazilian Portuguese (Português do Brasil).
Focus: Local Brazilian firmware updates and app permissions.
By Effendy. Specifically focuses on what to do when your car displays the prompt: "For your driving safety and system stability, please do not install third party apps."
Solution: Pinpointing the exact unlock toggle and permission grant path.
Applicable to: All Australian, UK, and Southeast Asian RHD vehicles.
Check your car's model and DiLink version under Vehicle Settings → Software Info to determine the most effective installation approach.
| Car Model | DiLink Version | Android Base | Primary Sideload Method | Backup Method | Compatibility |
|---|---|---|---|---|---|
| BYD Atto 3 / Yuan Plus | DiLink 3.0 / 4.0 | Android 10 | USB Direct (File Manager) | Calculator Code (20211225) |
100% Plug & Play |
| BYD Dolphin | DiLink 4.0 | Android 10 | USB Direct (File Manager) | Wireless ADB (Bugjaeger) | 100% Plug & Play |
| BYD Seal / Seal 6 | DiLink 4.0 / 5.0 | Android 12 / 13 | Secret Code via Calculator | Wireless ADB / Laptop | 100% Supported |
| BYD Sealion 7 / Sea Lion 07 | DiLink 100 / 5.0 | Android 12 | Secret Code via Calculator | Wireless ADB / Laptop | 100% Supported |
| BYD Tang / Han (EV & DM-i) | DiLink 3.0 / 4.0 / 5.0 | Android 10 / 12 | USB Direct (File Manager) | Secret Code (20201205) |
100% Supported |
| BYD Song Plus / Seal U | DiLink 4.0 / 100 | Android 10 / 12 | USB Direct (File Manager) | Wireless ADB (Bugjaeger) | 100% Supported |
| BYD M6 (Electric MPV) | DiLink 4.0 | Android 10 | USB Direct (File Manager) | Calculator Code (20211225) |
100% Supported |
If your BYD car prompts you for a verification password when installing an APK or accessing developer mode, use the following factory engineering codes. Tap to copy immediately.
Standard permission unlock code across DiLink 3.0 & 4.0 vehicles worldwide.
Type into built-in Calculator and press equals (=) to open Factory Engineering menu.
Legacy verification password for older 2021-2022 firmware versions.
Dial in vehicle Phone dialpad to invoke hardware test & developer toggle.
Official dealer service maintenance passcode used by certified technicians.
General factory QC test password accepted by several export European models.
The Dotix Companion App runs silently in the background of your BYD rotating screen, bridging physical button clicks with DiLink vehicle functions and AVAS external sound channels.
Includes full support for Dotix Key B1 (Single Key & 6-Key Array), low-latency BLE background service, dual AVAS acoustic horn channels, AC temperature & fan speed hotkeys, seat cooler toggle, and custom soundboard triggers.
Allows the physical button to perform instant system-wide hotkeys (e.g. Home, Back, Screen Rotation, Defrost toggle) without interrupting your navigation app.
Maintains an ultra-low energy connection with Dotix Key B1 button array for instant click responsiveness (<15ms latency).
Enables direct sound routing to BYD's exterior low-speed acoustic alerting speaker for friendly pedestrian alerts and the outdoor megaphone soundboard.