Unable to connect LTE

[yeo]

Dear Nordic team, 

I am unable to connect to LTE network through AT_client although I have successfully connected to the LTE network within the same area and it was working fine. I am not able to connect to the LTE currently and I have no idea why. Can you help to resolve this issue? I have attached my log and picture for reference

AT+CFUN?

+CFUN: 0

OK

AT+CFUN=1

OK

AT+CFUN?

+CFUN: 1

OK

AT+CGSN=1

+CGSN: "351358811466371"

OK

AT+CGMI

Nordic Semiconductor ASA

OK

AT+CGMM

nRF9160-SICA

OK

AT+CGMR

mfw_nrf9160_1.3.2

OK

AT+CEMODE?

+CEMODE: 2

OK

AT%XCBAND=?

%XCBAND: (1,2,3,4,5,8,12,13,18,19,20,25,26,28,66)

OK

AT+CMEE?

+CMEE: 0

OK

AT+CMEE=1

OK

AT+CNEC?

+CNEC: 0

OK

AT+CNEC=24

OK

AT+CGEREP?

+CGEREP: 0,0

OK

AT+CGDCONT?

OK

AT+CGACT?

OK

AT+CGEREP=1

OK

AT+CIND=1,1,1

OK

AT+CEREG=5

OK

AT+CEREG?

+CEREG: 5,4

OK

AT%CESQ=1

OK

AT+CESQ

+CESQ: 99,99,255,255,255,255

OK

AT%XSIM=1

OK

AT%XSIM?

%XSIM: 0

OK

%XSIM: 1

AT+CPIN?

+CPIN: READY

OK

AT+CPINR="SIM PIN"

+CPINR: "SIM PIN",3

OK

AT+CIMI

204080813695418

OK

%CESQ: 42,2,14,2

+CEREG: 2,"02C4","0B49FE6A",7

+CNEC_EMM: 15

+CEREG: 2,"02C4","0B49FE6A",7,0,15

%CESQ: 255,0,255,0

+CEREG: 2

%CESQ: 45,2,21,3

%CESQ: 35,1,6,0

[Amanda Hsieh]

Hi, 

+CEREG: 2,"02C4","0B49FE6A",7,0,15

Reject cause 15 typically points to a subscription or coverage issue:

Cause #15 – No suitable cells in the tracking area
This EMM cause is sent to the UE if it requests service, or if the network initiates a detach request, in a tracking
area where the UE, by subscription, is not allowed to operate, but when it should find another allowed tracking
area or location area in the same PLMN or an equivalent PLMN.

What sim card/operator are you using? Could you check the sim card/operator support LTE in your area?

Regards,
Amanda H.

[yeo]

Thanks for the reply, I am currently using iBasis eSim. I just used this eSim a few days ago and it was still working. So the sim card should support my area.

best regards,

Yeo Rhi Khin

[Amanda Hsieh]

yeo said:

I just used this eSim a few days ago and it was still working.

Are you using the same unmodified AT_client with the eSim? If so, could you contact iBASIS SINGAPORE https://ibasis.com/contact/ to check if they have any service updates or changes? There is the contact information for SINGAPORE on that page. 

-Amanda H.

[yeo]

Hi, this picture shows that Singapore telecom is available. But the PDN still showing red. 

best regards,

Yeo Rhi Khin

[Amanda Hsieh]

Hi, 

Please provide the log file. You could upload from the toolbar: insert -> file. 

-Amanda H.

[yeo]

Hi, I have managed to connect to LTE after waiting for 30 minutes. And I used AT+CFUN = 0 to remember the network setting. So it is working fine now. Thanks.