Solved Yealink T48S not registering on the Free Hosted version

[melbourne]

I'm trying to register a Yealink T48s Upgraded to the latest firmware version 66.86.0.15 as a normal phone. I have an SBC/router phone that has been registered and now trying to register the T48s as normal phone it refuses to register. The phone downloads the 3CX data successfully however, it does not stay online. The screen of the phone has all the buttons assigned but the it does not register.
Any reason why?

 

[TheodorosG_3CX]

Are you selecting the SBC?
Was the phone factory reset before provisioning?

 

[melbourne]

Yes to both.

 

[OlegR_3CX]

Hi Melvin.
As per our support ticket conversation, we have identified the source of the issue and advise on the solution.
I will now update and close this thread.
Have a nice day