Optional: Install the app from the Play Store to get detailed hardware specs, verifying it is indeed an AC8257. Where to Download "New" AC8257 Firmware
, ensure your COM port settings match your hardware version. Backup Your Apps:
Copy the update files directly to the root of the USB drive. Do put them in a folder. Connect & Boot:
: Extract the downloaded firmware. You will usually see files like 8259 , 8259.upd , or 8259.bin . Copy these directly to the root of the USB drive (not inside a folder).
If the unit is on, it may automatically detect the update and ask to "Start." If it doesn't, go to System Update
: Support for newer versions of ZLINK , which provides more stable wireless Apple CarPlay and Android Auto connectivity.
(often paired with the ) is a common System-on-a-Chip (SoC) used in budget-friendly Android car head units, such as those from or generic Chinese models labeled Current Firmware Status (April 2026)
: Should be updated alongside system firmware to fix hardware-level issues (audio, CANBUS, etc.). Download Sources
Optional: Install the app from the Play Store to get detailed hardware specs, verifying it is indeed an AC8257. Where to Download "New" AC8257 Firmware
, ensure your COM port settings match your hardware version. Backup Your Apps:
Copy the update files directly to the root of the USB drive. Do put them in a folder. Connect & Boot: ac8257 firmware new
: Extract the downloaded firmware. You will usually see files like 8259 , 8259.upd , or 8259.bin . Copy these directly to the root of the USB drive (not inside a folder).
If the unit is on, it may automatically detect the update and ask to "Start." If it doesn't, go to System Update Optional: Install the app from the Play Store
: Support for newer versions of ZLINK , which provides more stable wireless Apple CarPlay and Android Auto connectivity.
(often paired with the ) is a common System-on-a-Chip (SoC) used in budget-friendly Android car head units, such as those from or generic Chinese models labeled Current Firmware Status (April 2026) Do put them in a folder
: Should be updated alongside system firmware to fix hardware-level issues (audio, CANBUS, etc.). Download Sources