Modified versions often include "clean" Android 9 or Android 12 systems with developer options and ADB enabled.
Then, the anomaly. A line that wasn't in the official documentation: zte zxv10 b866v2 firmware
Dual-band Wi-Fi (802.11b/g/n/ac 2.4/5GHz) and Bluetooth 5.2. HDMI, AV (for older displays), and USB. device.report 2. Firmware Update Methods Modified versions often include "clean" Android 9 or
Debloating: Many B866V2 units are locked to specific ISPs. Flashing "clean" firmware can remove provider-specific apps and restrictions. AV (for older displays)