Why does my RG520N-EB not support the SA n41？

IoT Modules 5G Module
1

The firmware is RG520NEBDCR01A07M4G_XM,
AT+QNWPREFCFG= “nr5g_band”
+QNWPREFCFG: “nr5g_band”,1:3:7:28:38:75:77:78

2

Dear @test
RG520NEBDCR01A07M4G_XM is a customized firmware, I am not sure whether this project supports this.
You can try to add this AT+QNWPREFCFG= “nr5g_band”,1:3:7:28:38:41:75:77:78 .

3

Thank you, but it failed.

4

Dear @test
It is recommended to contact with your provider. I am not sure if they did some modification on your decive.