I called yesterday to complain about the Mifi 4510L. I upgraded the device 2 weeks ago hoping that it would solve the constant disconnecting from 4G to 3G and vice versa. After talking to a tech, he said that there was another upgrade today and he sent me the link. I followed the link, tried to upgrade, but when looking at the device version, it looked to be the same as the one I had, 2.16.07. The only thing different was the PRL number. And after successfully updating it before, this time I got an error code 6 and was unable to update the device.
Is there truly a newer upgrade? And if there is, what am I doing wrong this time?