The absolute best way to ensure the firmware works is to dump your current working ROM (if the unit still boots partially) using the adb pull command.
: Units typically feature a 64-bit ARM v8 architecture, which supports features like VoLTE if a SIM card slot is present. Ac8257 Firmware WORK
Here are some key takeaways from various reviews on the topic: The absolute best way to ensure the firmware
While the firmware is marked as "WORK," the following anomalies were noted: follow these steps:
To ensure you don't permanently "brick" your device, follow these steps: