based on the release notes for 8.10.x, looks like 9004-LTE is not supported.
and based on the datasheet, it is only supported for SD-WAN

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Original Message:
Sent: Jun 13, 2023 03:02 AM
From: safranek
Subject: 9004-LTE AOS firmware support?
No, I would like to use them as regular controllers (Mobility Gateways) managed by Mobility Conductor.
I have a cluster with 3 controllers, 2 of them are LTE version, all of them arrived with the same software release: 8.6.0.4-2.2.0.3 (build 77966)
I tried to upload new software (without reboot) to all of them, LTE version refuses new software with that error message. Non-LTE version accepted software without any problems.
Does LTE versions needed specific version of AOS software? I didn't find more specific software for them on aruba aps site.
Original Message:
Sent: Jun 12, 2023 07:13 PM
From: ariyap
Subject: 9004-LTE AOS firmware support?
are you planning to use 9004-LTE for SD-WAN with Aruba Central?
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If my post was useful accept solution and/or give kudos.
Any opinions expressed here are solely my own and not necessarily that of HPE or Aruba.