Cisco IR1800 and C1101 found many log fallback from ENDC to LTE

[jewfcb001]

Hi All,
I have test router IR 1800 with SIM 5G but I found the many log appear "%CELLWAN-2-NC_EVENT1: Cellular0/4/0: Network change event - fallback from ENDC to LTE" and "network change event - activated 4g carrier aggregation" 

I'm not what is some command for solve this issue . I need someone to help .

Thank you 

[Leo Laohoo]

Post the complete output to the following commands: 

sh cell 0/4/0 hardware | i PRI version
sh cell 0/4/0 radio 

Now, in a text file, please paste and attach the output to the command "sh cell 0/4/0 radio history all".

[jewfcb001]

@Leo Laohoo 
This is output from your command . If I plug all antenna on router status RSSI show unknow. 

#show cellular 0/2/0 hardware | in PRI version
PRI version = 0811-111, Carrier = Generic PTCRB
OEM PRI version = 0811-111
C1101-AIS#
C1101-AIS#show cellular 0/2/0 ra
C1101-AIS#show cellular 0/2/0 radio
Radio power mode = Online
LTE Rx Channel Number(PCC) = 1450
LTE Tx Channel Number(PCC) = 19450
LTE Band = 3
LTE Bandwidth = 20 MHz
Current RSSI = -92 dBm
Current RSRP = -124 dBm
Current RSRQ = -13 dB
Current SNR = 0.8 dB
Physical Cell Id = 321
Number of nearby cells = 1
Idx PCI (Physical Cell Id)
--------------------------------
1 321
Radio Access Technology(RAT) Preference = AUTO
Radio Access Technology(RAT) Selected = LTE
Network Change Event = unknown

[Leo Laohoo]

Current RSSI = -92 dBm
Current RSRP = -124 dBm
Current RSRQ = -13 dB
Current SNR = 0.8 dB

These numbers do not look good. 

Either relocate the router to a location with better LTE coverage, get a better antenna (like 5G-ANTM-O4-B) or talk to the provider.