Insert the USB into the head unit. Navigate to Settings > System > System Upgrade (or Android Upgrade ).
The —developed by AutoChip—is one of the most widely used system-on-a-chip (SoC) platforms powering budget-friendly Android car stereos . Sold under popular brands like Podofo, Roadanvi, and various unbranded factory models, these head units deliver modern infotainment features at accessible prices. However, software limitations over time can cause problems like frequent Bluetooth disconnects, ZLINK5 lag, or endless bootloops . Ac8257 Firmware WORK
Insert the USB drive into the head unit's USB port. Insert the USB into the head unit
Finding the correct firmware is the biggest challenge. Here are the most reliable sources: and various unbranded factory models
