When I load new firmware using the ZyXEL web UI of my ZyXEL VMG1312-B10A modem, quite often the upgrade process simply fails. There’s a long delay with a rotating symbol to enjoy, I give it a minute or two and then try to guess what to do next. I can try hitting refresh in the browser, and then I often get back to the modem login page, I log back in and then go back to the firmware upgrade page I was at before, hoping to see the version name string or the bin filename. At that point the modem either shows me the old version name or shows the ‘rebooting - wait’ modal alert box. So basically I have no idea what’s going on and no clue as to whether the flash replacement will simply fail and leave me with the old firmware.
Do you see these same problems? What do you do? Is there a rock-solid, reliable procedure that I should be using to do firmware upgrades that succeed first time?