EM7430 - Not registered on network

Hello all,

I am trying to integrate the EM7430 with a Linux SBC and have sofar managed the following:

  • Compile and install the drivers
  • Run the Sample Apps
  • Flash the latest formware (2.33)
  • Use minicom to send AT commands to the module.
  • Create a profile with APN, Username and Password as provided by the service provider.

I am a beginner in this field so my understanding is a bit sketchy. I assume that once the EM7430 is powered up with a SIM in it, the module connects itself to the available network as saved in the profile, correct? If this should be the ideal case, it is not happening with my mdule. Are there any known issues or workarounds for this?

The AT outputs to some of the commands are as follows:

Manufacturer: Sierra Wireless, Incorporated
Model: EM7430
Revision: SWI9X30C_02.33.03.00 r8209 CARMD-EV-FRMWR2 2019/08/28 20:59:30
MEID: < >
IMEI: < >
FSN: LR816109580110

Current Time: 4 Temperature: 23
Reset Counter: 1 Mode: ONLINE
System mode: LTE PS state: Not attached
LTE band: No band LTE bw: 1.4 MHz
LTE Rx chan: 0 LTE Tx chan: 4294967295
LTE CA state: ACTIVE LTE Scell band:No band
LTE Scell bw:1.4 MHz LTE Scell chan:0
EMM state: Deregistered Attach Needed
RRC state: RRC Idle
IMS reg state: No Srv

PCC RxM RSSI: 0 RSRP (dBm): 0
PCC RxD RSSI: 0 RSRP (dBm): 0
SCC RxM RSSI: 0 RSRP (dBm): 0
SCC RxD RSSI: 0 RSRP (dBm): 0
Tx Power: – TAC: 0000 (0)
RSRQ (dB): 0.0 Cell ID: 00000000 (0)
SINR (dB):

+CME ERROR: operation not allowed

+CME ERROR: no network service

CREG also shows a 0

I would be grateful if someone could point me in the right direction. I have seen a couple of other threads with very similar symptoms but those were a bit older and not conclusive, hence this new thread.


Please use the following AT commands:
AT+CGDCONT to ensure that profile is setup correctly for your carrier.
AT!GSTATUS to check the modem registration status
AT!SCACT command to start the data session. You can also use lite-connection-manager from the SDK sample apps.

You can get the AT commands guide and Linux SDK/drivers from https://source.sierrawireless.com/devices/em-series/em7430/


Hello Alan,

Thanks for your help. I had already tested the commands you suggested but with no luck.

I am glad to report though that I have figured out the problem and it is a tad embarassing. Adding a proper antenna did the trick.