Help me with the roblem of RM500U's signal

IoT Modules 5G Module
1

My device can find networks，but can’t get connection:

AT+CEREG?
+CEREG: 2,1,“35B4”,“067CEFAB”,7

OK
AT+QENG=“servingcell”
+QENG: “servingcell”,“NOCONN”,“LTE”,“FDD”,460,00,67CEFAB,450,1300,3,5,5,35B4,-82,-21,-44,-9,0,0,37

OK

AT+COPS=?
+COPS: (1,“CHINA MOBILE”,“CMCC”,“46000”,7),(3,“CHINA BROADNET”,“CBN”,“46015”,7),(0-4),(0-2)

OK
AT+COPS=1,2,“46000”,7
+CME ERROR: 1

AT+COPS=1,2,“46000”,7
+CME ERROR: 30
AT+COPS=1,2,“46000”,7
+CME ERROR: 30
AT+COPS=1,2,“46000”,7
+CME ERROR: 30
AT+COPS=1,2,“46000”,7
+CME ERROR: 30
AT+COPS=1,2,“46000”,7
+CME ERROR: 30
AT+COPS=0
+CME ERROR: 30
AT+COPS=0
+CME ERROR: 30
AT+COPS=1,2,“46000”,7
+CME ERROR: 30
AT+COPS=1,2,“46000”,7
+CME ERROR: 30
AT+COPS=1,2,“46000”,7
+CME ERROR: 30

2

Dear @TR_J
Your device had registered on LTE network, so you can’t use AT+COPS to lock operator.
AT+QENG=“servingcell”
+QENG: “servingcell”,“NOCONN”,“LTE”,“FDD”,460,00,67CEFAB,450,1300,3,5,5,35B4,-82,-21,-44,-9,0,0,37

Why did you think it can’t get connection?

3

Is there any methods to boost signal? like bandwidth or power level?

4

Dear @TR_J
Actually, for module, it doesn’t have any good idea.

5

:joy: well thanks anyway!