Aot4221sr Firmware Upgrade ~upd~ [DIRECT]

: Always perform the upgrade using an Ethernet cable rather than Wi-Fi to avoid connection drops that can "brick" the device. Power Stability

: Ensure your computer or smartphone is connected to the AOT-4221SR via Wi-Fi or an Ethernet cable. aot4221sr firmware upgrade

: After the upgrade is complete, check the device's firmware version again to ensure it has been updated successfully. : Always perform the upgrade using an Ethernet