How to activate?
How to activate?
**Subject:** Firmware Request - Dasaita HA2225B (Serial: 20001) - Stability Issues
**Message:**
Dear Dasaita Support,
I own Dasaita HA2225B (8+256GB) with the following details:
**Device Information:**
- Model: HA2225B
- Serial Number: 20001 / D03D5EE6A2489D24
- Platform: G13 (Qualcomm Snapdragon 665)
- Current MCU: MTCHS_HA4Z_V4.15a_1 (Nov 14 2024)
- Android Version: 13
- Build Number: QCM6125 13 S10A_123 eng.hct.20250311.103730 EAU
**Problems:**
1. Black screen every 2 days - only hard reset helps
2. System freezes and random reboots
3. UI lag and slow app startup
4. Audio delay
5. 3D car widget constantly reloads and crashes
Please provide the latest stable firmware and MCU for my device serial number to fix these stability issues.
Thank you.
Best regards,

My vivid 11 for my 2015 Tundra is stuck in a boot loop. I have tried to factory reset, and it's still not getting to the OS, it's just a black screen. Where do I get the image file to update it?
@King Mitch To recover back the 1280x720 resolution, you will need the mcu file for your unit (the same version or newer) dmcu.img and create a text file names dmcu.ext with the following content in the first line: screen:12
Copy both files into USB and go to settings to look for an MCU update. Once detected the files perform the update and after rebooting you will find again 1280x720 resolution back.
to restore back Zlink app go to Vehicle settings/Fctory Setting and with password 126 go to the first tab and check if the Zlink option is disabled. If so, enable it. It will recover back teh Zlink app to the drawer.