My AP3825i's have two internal mPCIe Wi-Fi cards.
One card supports Wi-Fi 4 and 5 over 5GHz, the other supports Wi-Fi 1, 2, 3, 4 over 2.4 GHz, and 5 GHz.
Both default to 5GHz it seems, so even setting radio num to 2 in my device settings under OpenSOHO causes makes both radios appear as 5GHz.
radio0 Qualcomm Atheros QCA9880:
radio1 Qualcomm Atheros AR9590:

My AP3825i's have two internal mPCIe Wi-Fi cards.
One card supports Wi-Fi 4 and 5 over 5GHz, the other supports Wi-Fi 1, 2, 3, 4 over 2.4 GHz, and 5 GHz.
Both default to 5GHz it seems, so even setting radio num to 2 in my device settings under OpenSOHO causes makes both radios appear as 5GHz.
radio0 Qualcomm Atheros QCA9880:
radio1 Qualcomm Atheros AR9590: