If the PC crashed, the flash failed.
[==============] 100% VERIFYING HASH... HASH VERIFIED. aot4221sr firmware upgrade full
Upgrading the firmware for the (a common Airtel Xstream Fiber ONT/router) typically involves moving from older, potentially bugged versions to more stable releases that improve Wi-Fi stability , VLAN handling , and security . If the PC crashed, the flash failed
The progress bar appeared. [==== ] 15%