Cannot provision phone

[RDWild]

We have about 30 phones provisioned in this hosted system, one wasn't getting updates, so we deleted it, factory reset the phone, and tried to reprovision. The phone just says No Service in the upper left corner and does not want to provision. We've tried different phones, different users, different network connecitons, different SBCs, restarted 3CX on hosted server phones will just no longer provision.
Phones tested with are Fanvil X3U, X4U, X5U, and X6U.

 

[JohnS_3CX]

Cool, so the RPS entry is delivered but the phone never requests it according to the Event Log.

Therefore, it becomes likely that something is preventing the phone from either reaching RPS, or 3CX, or both.

This would be a good starting point to check.

 

[KyriacosS_3CX]

And do double check the firmware is the one provided by 3CX - it could be the same version number but messed up from somewhere else.