Open your device and look for the "ZL782-MB-V2.1" string printed directly on the green PCB.
Wrong WiFi driver = No WiFi or Bluetooth after flash. zl782-mb-v2.1 firmware download
Email the seller or manufacturer technical support. Provide the full board photo and current BIOS string. They often email the correct .bin , .rom , or .fd file. Open your device and look for the "ZL782-MB-V2
: Ensure you have installed the correct USB VCOM or ADB drivers for your specific chipset on your PC. zl782-mb-v2.1 firmware download
Once the correct firmware is flashed, these boards are known for stable basic performance, though they are limited by the modest hardware common in this category.