RG500 not booting up correctly after firmware update

Hi, I have a 5G modem uses this firmware version

But after the upgrade, the modem doesn’t boot back to normal mode.
It shows Limited LTE state. Qualcomm/Diagnostic
With a USB Host3-Port1 Device(0x05c6/0x9008/1) plug-in detected

which I think is the Qualcomm Diagnostic Port.

How can I revive this ?
Can I please get a latest copy of the firmware RG500QEAAAR11A03M4G_ACY
as well as the QFlash ?

Dear Sir,
Could you tell me where do you get the firmware, RG500QEAAAR11A03M4G_ACY, it is a customized version.
In order to give you a better support, can I ask you to provide some info about the project?

  • Company name and located city:

  • Project name (so we can refer to it in the future):

  • Application type:

  • Estimated Annual Units (for series production):

  • Project timeline:

  • Current status:

  • From which distributor do you buy Quectel modules & EVB kits?

  • Do you have EVB kit for this application?

This firmware was pushed by the carrier - Telstra in Australia
Modem is now half-dead only GUI working, the modem module is stuck in Qualcomm diag mode

Dear Sir,
RG500QEAAAR11A03M4G_ACY is a customized version, and can not be upgraded to standard version.
So, if you want to do the test, please contact our sales or distributors to buy a new EVB kits and test.
We have local sales and FAEs team in Australia.Thanks!