T48 won't upgrade

[Nimans_Support]

Hi lonvoice,

I can confirm the MAC you had sent me is currently on Yealink's RPS service.
It is pointing to a server which looks to be hosting your firmware file.

Could I ask, who did you purchase this device from and when (approximately).
Also, what phone system are you currently connected to ?
Finally, would you be happy if I removed this device from the RPS ? It would no longer provision any settings to the phone so you'd have to set it up yourself.

Thanks,
Matt